In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

Thursday’s briefing for reporters was intended to refute reports, including one by Fox News last Friday, that the C.I.A.’s chain of command had blocked the officers on the ground from responding to the mission’s calls for help. 
  
 “There were no orders to anybody to stand down in providing support,” the official said, speaking on the condition of anonymity because of continuing investigations by the State Department and the F.B.I. 
  
 At a time when the circumstances surrounding the attack on the Benghazi compound have emerged as a major political issue, with Republicans criticizing the Obama administration’s handling of the episode, the senior official also sought to rebut reports that C.I.A. requests for support from the Pentagon that night had gone unheeded. 
  
 In fact, the official said, the military diverted a Predator drone from a reconnaissance mission in Darnah, 90 miles away, in time to oversee the mission’s evacuation. The two commandos, based at the embassy in Tripoli, joined the reinforcements. And a military transport plane flew the wounded Americans and Mr. Stevens’s body out of Libya. 
  
 Despite the new details, many questions surrounding the attack remain unanswered, including why the State Department did not increase security at the mission amid a stream of diplomatic and intelligence reports that indicated that the security situation in Benghazi and around Libya had deteriorated sharply since the United States reopened its embassy in Tripoli last year. 
  
 By underscoring the C.I.A.’s previously unpublicized role in mobilizing the evacuation effort, the officials seemed to be implicitly questioning the State Department’s security arrangements in Benghazi, a focus of three Congressional inquiries into the attack on the mission. 
  
 The senior officials also shed new light on the C.I.A.’s role in Libya. 
  
 Within months of the start of the Libyan revolution in February 2011, the agency began building a meaningful but covert presence in Benghazi, a locus of the rebel efforts to oust the government of Col. Muammar el-Qaddafi . 
  
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 The C.I.A.’s surveillance targets in Benghazi and eastern Libya included Ansar al-Shariah, a militia that some have blamed for the attack on the mission, as well as suspected members of Al Qaeda ’s affiliate in North Africa, known as Al Qaeda in the Islamic Maghreb . 
  
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 American intelligence operatives also helped State Department contractors and Libyan officials in tracking shoulder-fired missiles taken from the former Libyan Army arsenals, American officials said. 
  
 The C.I.A.’s security officers played a new role on Sept. 11, carrying out an informal agreement with the mission to come to its aid in an emergency. One of the senior intelligence officials provided an hour-by-hour chronology of the agency’s role during the attack. 
  
 Around 9:40 p.m. local time, the C.I.A. base received the first of several calls from the mission saying it was under attack. During the 25 minutes between the first call and when the officers rolled out the door, half a dozen security officers were readying their gear and weapons, while the base chief called several Libyan militias, seeking fighters with heavy weaponry to defend the mission. His appeals failed. 
  
 Over the next 25 minutes, C.I.A. officers approached the walled diplomatic compound, tried to secure heavy weapons, and made their way onto the compound itself in the face of enemy fire. 
  
 At 11:11 p.m., the Predator drone arrived over the mission compound. Within 20 minutes, all United States personnel, except for Mr. Stevens, whom the American security officers could not find in the chaos, left the mission, coming under fire as they did. 
  
 The Americans retreated safely to the C.I.A. annex, where over the next 90 minutes they came under sporadic small-arms fire and rocket-propelled-grenade attacks. The State Department and C.I.A. officers returned fire and the assailants melted away. 
  
 About this same time, the reinforcements arrived at the Benghazi airport from Tripoli. Learning that the attacks at the annex had stopped, the team turned its attention to finding Mr. Stevens. But learning that he was at a Benghazi hospital, almost certainly dead, and that the security situation at the hospital was uncertain, the reinforcements headed to the annex. 
  
 They arrived shortly after 5 a.m., just before mortar rounds began to hit the annex. That attack, 11 minutes long, killed two men, whom the senior intelligence officials identified for the first time Thursday as C.I.A. security officers, Tyrone S. Woods and Glen A. Doherty, former members of the Navy SEALs . Until now the men had been publicly identified as State Department contract security officers. 
  
 Less than an hour later, a convoy of 50 heavily armed trucks from Libyan military intelligence arrived to help evacuate all American personnel from the annex to the Benghazi airport. ||||| The CIA rushed security operatives to an American diplomatic compound in Libya within 25 minutes of its coming under attack and played a more central role in the effort to fend off a night-long siege than has been acknowledged publicly, U.S. intelligence officials said Thursday. 
  
 The agency mobilized the evacuation effort, took control of an unarmed U.S. military drone to map possible escape routes, dispatched an emergency security team from Tripoli, the capital, and chartered aircraft that ultimately carried surviving American personnel to safety, U.S. officials said. 
  
 The account provided by senior U.S. intelligence officials offers the most detailed chronology yet of the Sept. 11 assault that killed the U.S. ambassador to Libya and three other Americans. The attack has become a flash point in the U.S. presidential campaign. 
  
 The decision to give a comprehensive account of the attack five days before the election is likely to be regarded with suspicion, particularly among Republicans who have accused the Obama administration of misleading the public by initially describing the assault as a spontaneous eruption that began as a protest of an anti-Islamic video. 
  
 U.S. officials said they decided to offer a detailed account of the CIA’s role to rebut media reports that have suggested that agency leaders delayed sending help to State Department officials seeking to fend off a heavily armed mob. 
  
 1 of 13 Full Screen Autoplay Close Skip Ad × Bodies of 4 Americans killed in Libya returned to the U.S. View Photos The bodies of U.S. Ambassador to Libya J. Christopher Stevens and three other Americans killed in an attack on the U.S. Consulate in Benghazi were returned to the United States in a ceremony at which President Obama declared that the United States “will never retreat from the world.” Caption The bodies of U.S. Ambassador to Libya J. Christopher Stevens and three other Americans killed in an attack on the U.S. Consulate in Benghazi were returned to the United States on Friday in a ceremony at which President Obama declared that the United States “will never retreat from the world.” Sept. 14, 2012 U.S. Marines carry a casket during a ceremony at Joint Base Andrews in Maryland transferring the remains of the four Americans killed in an attack this week in Benghazi, Libya. Jewel Samad/AFP/Getty Images Buy Photo Wait 1 second to continue. 
  
 Instead, U.S. intelligence officials insisted that CIA operatives in Benghazi and Tripoli made decisions rapidly throughout the assault with no interference from Washington. 
  
 “There was no second- 
  
 guessing those decisions being made on the ground, by people at every U.S. organization that could play a role in assisting those in danger,” a senior U.S. intelligence official said in a prepared statement that summarized the chronology of the attack and was made available to news organizations. 
  
 The information does not address the main source of political controversy surrounding the siege: the shifting assessments offered by Obama administration officials over whether the assault was a protest that turned violent or a planned terrorist attack. 
  
 But officials reiterated that the initial intelligence was fragmentary and often contradictory. They said talking points for members of Congress and senior administration officials did not discuss possible links between the attackers and al-Qaeda because the information was classified. 
  
 “It wasn’t until after the points were used in public that people reconciled contradictory information and assessed there probably wasn’t a protest around the time of the attack,” the senior U.S. intelligence official said. 
  
 The briefing and material provided Thursday focused on the hour-by-hour developments in Benghazi. Among the disclosures is that the CIA station chief 
  
 in Tripoli sent an emergency security force, with about a half-dozen agency operatives as well as two U.S. military personnel, to Benghazi aboard a hastily chartered aircraft while the attack was underway. 
  
 The team arrived after midnight and attempted to organize an effort to make its way to a hospital where U.S. Ambassador J. Christopher Stevens had been taken and was thought to be alive. 
  
 But the team was held up by a combination of the time required to secure transportation and arms from U.S.-allied Libyan militias, new reports that the ambassador was probably already dead and uncertainty about the security situation at the hospital. 
  
 The annex in Benghazi to which U.S. diplomatic personnel were evacuated was a CIA base that the agency had established as its first stronghold in Libya before autocrat Moammar Gaddafi was overthrown late last year. 
  
 U.S. officials said the CIA base learned of the assault on the nearby diplomatic compound in a desperate phone call about 9:40 p.m. 
  
 CIA security operatives assembled their gear and lined up vehicles even while agency officials sought, without success, to enlist Libyan militias that had been hired to provide security for the diplomatic outpost in Benghazi. 
  
 “Over the next 25 minutes, team members approach the compound, attempt to secure heavy weapons” from Libyans encountered along the way and “make their way onto the compound itself in the face of enemy fire,” the senior U.S. intelligence official said. 
  
 Shortly after 11 p.m., an unarmed Predator drone diverted from another mission arrived over Benghazi and began providing video surveillance. 
  
 The CIA operatives appear to have been part of a broader group of U.S. security personnel and Libyan guards who made several attempts to fight their way into a structure known as “Villa C,” which served as the safe house and the VIP residence for the mission, and where Stevens had taken cover. Each time, the would-be rescuers were forced to retreat from heavy smoke and flames that had engulfed the structure. 
  
 By 11:30 p.m., “all U.S. personnel, except for the missing U.S. ambassador, depart the mission,” the U.S. intelligence official said. “The exiting vehicles come under fire.” 
  
 By then, attackers had also descended on the CIA compound, about a mile from the diplomatic facility. The “annex,” as the CIA base was known in internal documents, continued to come under small-arms and rocket fire sporadically over the next 90 minutes. 
  
 Then, about 1 a.m., the siege went suddenly quiet, a pause that would last until near 
  
 daybreak, apparently leading CIA and State Department officials to think that the danger had passed. 
  
 In the “pre-dawn time frame, that team at the airport finally manages to secure transportation and armed escort and — having learned that the ambassador was almost certainly dead — heads to the annex to assist with the evacuation,” the official said. 
  
 The team arrived, accompanied by Libyan security elements, at 5:15 a.m., “just before the mortar rounds begin to hit the annex,” the official said. Other accounts have suggested that multiple mortars were aimed at the site, initially missing their target before striking the roof, where guards had taken position and were returning fire. 
  
 Two CIA contractors, both former Navy SEALs, were killed: Tyrone Woods, a security officer based in Benghazi, and Glen Doherty, who was part of the team rushed by air from Tripoli. 
  
 That final spasm of violence lasted 11 minutes, officials said. “Less than an hour later, a heavily-­armed Libyan military unit arrived to help evacuate the compound of all U.S. personnel,” the senior U.S. intelligence official said. 
  
 The account, though the most comprehensive to date, still leaves a number of questions unresolved. Among them are why the single Predator overhead was unarmed and whether a model equipped with Hellfire missiles might have been able to strike the mortar launching site used by the attackers or otherwise disrupt the assault. 
  
 Another question is why “a heavily-armed Libyan military unit” was able to arrive at the annex around sunrise but was not available earlier despite presumably frantic U.S. calls. 
  
 Julie Tate contributed to this report. ||||| When the bodies of Ambassador Christopher Stevens and three other Americans killed in Benghazi, Libya, arrived at Andrews Air Force Base after the Sept. 11 attack, they were greeted by the president, the vice president and the secretaries of state and defense. Conspicuously absent was CIA Director David Petraeus. 
  
 Officials close to Mr. Petraeus say he stayed away in an effort to conceal the agency's role in collecting intelligence and providing security in Benghazi. Two of the four men who died that day, Tyrone Woods and Glen... |||||
The CIA played a bigger role in the response to the Sept. 11 attacks in Benghazi than was previously known, say US intelligence officials, rebutting media claims that the agency was slow to send help. Security agents were on the scene in 25 minutes, taking charge of evacuations, the Washington Post reports—and indeed most of those evacuated were working for the CIA, notes the Wall Street Journal: Just seven of the 30 people evacuated worked for the State Department. Washington didn't get in the way of the CIA's efforts, intelligence officials say: "There was no second-guessing those decisions being made on the ground, by people at every US organization that could play a role in assisting those in danger." Still, the Journal highlights potential problems in the relationship between the State Department and the CIA, suggesting that the highly secretive role of the agency may have hindered the response to some extent. The consulate functioned in large part as cover for the agency, and investigators in Congress say intelligence agents and State officials may not have been clear on their respective roles there. The CIA, according to critics in Congress, has maintained secrecy in part to duck blame; agency insiders reject the assertion. The new information doesn't address the big controversy, that being the administration's changing accounts of the cause of the attacks, the Post notes. It adds that Republicans are likely to question the timing of the new briefing days before the election. The New York Times has more on the "major role" of the CIA in the response.