Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Problem:Audience members listen as President Barack Obama delivers remarks at Kotzebue School, Wednesday, Sept. 2, 2015, in Kotzebue, Alaska. Obama is on a historic three-day trip to Alaska aimed at showing solidarity... (Associated Press) 
  
 KOTZEBUE, Alaska (AP) — President Barack Obama crossed the Arctic Circle on Wednesday in a first by a sitting U.S. president, telling residents in a far-flung Alaska village that their plight should be the world's wake-up call on global warming. 
  
 Obama's visit to Kotzebue, a town of some 3,000 people in the Alaska Arctic, was designed to snap the country to attention by illustrating the ways warmer temperatures have already threatened entire communities and ways of life in Alaska. He said, despite progress in reducing greenhouse gases, the planet is already warming and the U.S. isn't doing enough to stop it. 
  
 "I've been trying to make the rest of the country more aware of a changing climate, but you're already living it," Obama told a crowd of more than 1,000 in this rough-and-tumble town on Alaska's western coast. 
  
 As he closed out a three-day tour of the state focused almost entirely on climate change, the president sought to show solidarity with Alaska Natives and rural Alaskans whose immense challenges are rarely in the national spotlight. His brief visit had the feeling of a campaign rally, with throngs of people cheering and applauding when he invoked the historic nature of the first presidential visit to the Arctic. 
  
 From the moment Air Force One touched down in Kotzebue, examples of dire poverty and climate-related obstacles were easy to spot. Obama's motorcade snaked through the town passing rows of rusting shipping containers and dilapidated huts - almost all on stilts to accommodate gusts of wind and other weather-related events. 
  
 It was a topic Obama brought up, by way of praising Alaskans for their perseverance despite poverty, isolation and a lack of support. He said while many speak of America's pioneering, independent spirit, in Alaska it's not just a slogan but a way of life. 
  
 "It can be harsh," Obama said. "That means that you depend on each other." 
  
 Obama came to Alaska with no grand policy pronouncements or promises of massive federal aid. Instead, he sought to use the changes to Alaska's breathtaking landscape to put pressure on leaders in the U.S. and abroad to cut greenhouse gas emissions, as he works to secure a global climate treaty that he hopes will form a cornerstone of his environmental legacy. 
  
 Temperatures in the Arctic are rising twice as fast as anywhere else on earth, Obama said. Permafrost, the layer of frozen ice under the surface, is thawing and causing homes, pipes and roads to sink as the soil quickly erodes. Some 100,000 Alaskans live in areas vulnerable to melting permafrost, government estimates show. 
  
 As he flew to Kotzebue from the fishing village of Dillingham, Obama directed Air Force One to descend so he could get a closer look at the 400-person village of Kivalina, where residents have voted to relocate the entire village as it sinks into the water. 
  
 "Think about it," Obama said. "If another country threatened to wipe out an American town, we'd do everything in our power to protect it." 
  
 Obama ticked through his favorite sights from his tour of Alaska — the receding glacier in Seward, the spawning salmon in Dillingham and the cockpit of a tiny float plane. He took particular pleasure in reminding Alaskans that, on the eve of his visit, he'd renamed the famed Mount McKinley, the continent's highest peak, to Denali, its traditional name. 
  
 Alaska Natives have joined the president in sounding the alarm on climate change. Yet the obstacles they confront daily in rural Alaska extend far deeper, raising questions about whether the federal government has done enough to help. 
  
 "The cost of living here is very high. We live off the land," said Red Seeberger of the Inupiaq tribe. "But we still live by our culture." 
  
 Alaska officials say well over $2 billion in federal and state funds have been spent over the last 50 years to bring indoor plumbing to rural Alaska, but the challenge is finding money to build water and sewer systems in nearly three dozen village that still lack them. 
  
 As Obama's travels brought him near the Bering Sea, U.S. officials reported the presence of five Chinese PLA Navy ships in the sea — the first time they have been observed there. White House press secretary Josh Earnest said U.S. officials didn't view the Chinese vessels as a threat but added that the reason for their presence was unclear. 
  
 In an earlier visit Wednesday to Kanakanak Beach in Dillingham, Obama inspected all aspects of the fishing operation and pronounced a sample of salmon jerky to be "outstanding." He took it in stride when a salmon spawned on his shoes, quipping that the writhing fish "was happy to see me." 
  
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 Reach Josh Lederman on Twitter at http://twitter.com/joshledermanAP ||||| Five Chinese navy ships are currently operating in the Bering Sea off the coast of Alaska, Pentagon officials said Wednesday, marking the first time the U.S. military has seen Chinese naval activity in the area. 
  
 The officials have been tracking the movements in recent days of three Chinese combat ships, a replenishment vessel and an amphibious landing ship after observing them moving toward the Aleutian Islands, which are split between U.S. and Russian control. (Latest News: Chinese Navy Ships Off Alaska Passed Through U.S.... ||||| Advertisement Continue reading the main story Stories from Our Advertisers 
  
  
  
  
  
  
  
 WASHINGTON — Five Chinese Navy ships were sailing in international waters of the Bering Sea off the coast of Alaska on Wednesday, in what Pentagon officials said was the first such foray by Beijing. 
  
 The move came on the last day of President Obama’s three-day visit to Alaska, in which he became the first sitting president to travel to Arctic Alaska. The White House said that the intent of the Chinese operation was unclear, but that the Pentagon had not detected any threatening activities. 
  
 The foray may be more about economics than defense. The Arctic has become hotly contested as the United States, Russia and China, among other nations, have expanded their economic and security interests. A growing number of vessels have been traveling north through the Bering Strait, and the Coast Guard has diverted ships from other core missions to manage the traffic. 
  
 A Pentagon official noted that China has every right to patrol international waters, adding that American warships often ply waters off the coast of China. “I wouldn’t call this something we are very worried about,” the official said. He said that American officials had identified a Chinese amphibious ship, three surface combatant ships and a replenishment vessel in the Bering Sea. 
  
 Capt. Jeff Davis, a Pentagon spokesman, said that the Defense Department respected “the freedom of all nations to operate military vessels in international waters.” 
  
 The operation, which was first reported by The Wall Street Journal, came as China has been increasingly flexing its military muscle, particularly off its own coast. Beijing has increased military spending and is working on an aircraft carrier. Last year, Chinese officials took Chuck Hagel, the defense secretary at the time, on a tour of the carrier, the Liaoning. Many American officials interpreted the move as an effort to project naval power, particularly in light of tensions between Beijing and its neighbors over disputed islands in the East and South China Seas. 
  
 China is also developing stealth fighters, and it has continued to reclaim islands in the two seas at a brisk pace. |||||
Solution:
Bad timing? In what the Pentagon says is a first, five Chinese warships were spotted in international waters in the Bering Sea off the coast of Alaska yesterday as President Obama visited the state, reports the Wall Street Journal. Defense officials say they're not entirely sure what the Chinese vessels are doing in the area of the Aleutian Islands, but they are not considered a threat or a major concern and the US respects "the freedom of all nations to operate military vessels in international waters in accordance with international law," the New York Times reports. Analysts tell the Journal that the sighting is another sign of China's shift toward having a "blue water navy" that regularly sails far from its own shores. In another first, President Obama became the first sitting US president to cross the Arctic Circle yesterday, the AP reports. "I've been trying to make the rest of the country more aware of a changing climate, but you're already living it," he told a crowd in the town of Kotzebue. He has used much of his Alaska visit to sound the alarm on climate change, and to call for more American icebreakers. Earlier in the day, Obama visited the fishing town of Dillingham, where he joined local schoolchildren in a traditional dance. In what was almost certainly another first, a salmon spawned on the president's shoes when he picked it up, prompting a resident to quip that it was "happy to see him," reports the Alaska Dispatch.