Generate an appropriate single-sentence summary for the given text such that it includes the main topic of the text.

Israel's military rarely acknowledges operations in Syria, but it claimed on Saturday its strikes had prevented an attack on Israel "using killer drones". PM Benjamin Netanyahu hailed his military's "major operational effort". Israel is believed to have carried out hundreds of strikes in Syria since civil war broke out there in 2011, to try to prevent Iran gaining a foothold. An Israeli military spokesman said the strikes on Saturday targeted the Quds Force of the Iran's Islamic Revolution Guard Corps (IRGC) in Aqraba, south-east of the capital, Damascus. A Syrian military source quoted by the official Sana news agency said that Syrian anti-aircraft defences "detected enemy targets from Golan heading towards the area around Damascus". "The aggression was immediately confronted and so far the majority of the enemy Israeli missiles have been destroyed before reaching their targets," the source said. In a tweet, Mr Netanyahu said: "I reiterate: Iran has no immunity anywhere. Our forces operate in every sector against the Iranian aggression. 'If someone rises up to kill you, kill him first.'" The head of the Iranian-backed Lebanese militant group Hezbollah, Hassan Nasrallah, said two Lebanese nationals had been killed in the Israeli strike, which he said targeted Hezbollah positions. 'Blatant attack' Separately, reports said two Israeli surveillance drones had come down in the Lebanese capital, Beirut. Hezbollah officials said an unmanned drone fell on the roof of a media centre belonging to the group, and was followed by a second unmanned drone that exploded in mid-air and crashed nearby. Hassan Nasrallah denounced the attack, saying that it was the first since the two sides fought a brief war 13 years ago. The group would prevent any future attacks, he said, adding: "The time when Israeli aircraft come and bombard parts of Lebanon is over." Residents told the Associated Press they heard a large explosion that shook the area, after hearing the sound of an aircraft. Israel's military declined to comment on the reports. Lebanese Prime Minister Saad Hariri called Israel's alleged surveillance drones a "blatant attack on Lebanon's sovereignty". "This new aggression... forms a threat to regional stability and an attempt to push the situation towards more tension," he said in a statement. Israel reportedly also carried out an airstrike last month on a weapons depot in Iraq. The New York Times, citing unnamed US officials, said that Israel was behind the 19 July strike on an arms depot that the officials said was being used by Iran to move weapons to Syria. The Israeli military refused to comment on the strike.
Israel has struck Iranian military sites in Syria to prevent what it said was a pending drone strike by Iran.

By Michael OsbornEntertainment reporter, BBC News The ITV1 series is poised to return to its lucrative Sunday evening slot after The X Factor, and hopes are high that the saga will spin further ratings gold. Downton's executive producer Gareth Neame has boldly declared that the drama has the legs to run for "years and years" and into several series, taking the story of the Crawley family and their household into the 1930s. But for the moment, the action in and around the Yorkshire stately pile resumes two years into World War I, which is pulling Downton's well-ordered fabric to pieces. Maids are serving in the dining room as their male counterparts have gone to the front, while the Crawley daughters are taking up driving and nursing to do their bit for the war effort. As the conflict takes its toll, it is clear that emotions will run very high as the series pans out. The show's actors are more restrained about the possibility of reprising their roles for several series. Rob James Collier, who plays footman-turned-soldier Thomas Barrow in the show, says: "When Julian [Fellowes, Downton creator] set out to write it he was going to do it in three parts, which is an attractive package. "I'm not going to think beyond that. Whether it will go on because of its early success, I'm not sure," he adds. Actor Brendan Coyle, the Earl of Grantham's valet John Bates, also expresses reservations about Downton's long-haul chances and sticking with his role. "It's as long as the storytelling remains fresh," he explains. "Audiences tend to decide when a series is over." It was the viewing public who gave Downton its greatest endorsement during the last series, ensuring it would come back for a second run. Highbrow Jim Carter, who plays fastidious, devoted butler Mr Carson says audiences found the series more "accessible". "A common theme I get from people watching Downton is that they didn't think costume dramas were for them - they might be a bit BBC, highbrow and off-putting. This is on ITV so they thought they'd give it a go." He adds that the drama's high production values and ability to tell a story has added to its lustre - not to mention its gentle tenor following the frenzy of The X Factor on Sunday evenings. Hugh Bonneville, who plays the Earl of Grantham, agrees with the assessment, saying Downton "has gone beyond the traditional costume drama audience". But seated in the splendour of Highclere Castle in Berkshire, the actor maintains that the main star of the show is the splendid house which forms the real-life backdrop for Downton. About half the scenes are filmed in the house's numerous rooms and outdoor areas, with sequences in the servants' quarters set in a purpose-built lot at Ealing Studios. Bonneville says the house is the "main character" of Downton and "the bedrock around which everyone else revolves". "We may all change but it's likely to stand for years. It's a formidable character, the one thing that doesn't change." Irish actor Allen Leech, who plays chauffeur Tom Branson, also maintains that Downton - or Highclere - "has its own character". "I remember the first time I drove up to it - it's breathtaking, so steeped in history and makes our jobs as actors easier." There is another treasure who has made a considerable impact in the first series and promises to maintain such a presence in the new run of Downton. Humdingers Dame Maggie Smith plays the imperious Violet, Dowager Countess of Grantham, who has built up a reputation for delivering a barrage of blistering one-liners, both withering put-downs and humorous asides. "Julian quite rightly gives her the humdingers and you spend the entire scene teeing them up and then letting her get on with it," says Bonneville, her on-screen son. Michelle Dockery, a younger member of the cast who plays Lady Mary Crawley - Violet's granddaughter - says Dame Maggie is "incredibly caring and amazing to work with". "She makes it look so easy and effortless. But there's no way to try to achieve what you see her doing. It's the little details that she puts into a scene, even adding something that's not written in it," adds the actress. The impact of the series, which has become a hit in the US and collected 11 Emmy nominations, is not lost on Dame Maggie, herself a winner of two Oscars. "I actually do very little television, so I've never been in anything that's been this big before," she has said. The show's prospects of resuming its place as a Sunday night stalwart and capturing impressive viewing figures once again seem very favourable. Downton Abbey begins on ITV1 on Sunday 18 September at 21:00 BST
Period drama Downton Abbey proved one of the big television hits of 2010, regularly attracting audiences of nearly 10 million viewers.

By Anisa SubedarNewsbeat reporter It's after musicians, staff and DJs were delayed travelling to Londonderry after an emergency plane landing closed both runways at Heathrow. AlunaGeorge tweeted that they were "gutted" they were not able to play at the three-day festival. All three artists had been due to perform on Friday night on the Main and the 1Xtra/In New Music We Trust Stages. A statement from the Radio 1 press office said: "Unfortunately due to the travel disruption affecting Heathrow we've had to cancel a few performances but we've still got an exciting line-up for our audiences." Rudimental had previously decided not to play but are now performing. Fingers Crossed Rita Ora, who is due to perform on Friday evening at the event in Derry, spoke to Newsbeat at the London airport. "It's sad when a festival doesn't go to plan. It's annoying," she said. "All I know is the acts aren't giving up so that's a good sign." Four hours after their flight was due to take off, artists including AlunaGeorge and Angel Haze were still at Terminal 1. Rita Ora described the terminal at Heathrow as a "Radio 1 reunion" as artists and stars from the station continued to look for an alternative route to Northern Ireland. The airline said the Heathrow to Oslo service turned back after a technical fault before 9am. Witnesses reported seeing flames coming from one of the engines. Other artists thought to be affected by the delays include J. Cole and Wiley, who are due on stage on Friday evening. Rita Ora, who is headlining the 1Xtra Arena/In New Music We Trust Stage, says she is hopeful that she can still make it to the event in time to perform her set. "Fingers crossed," she said. "I think Radio 1 will figure it out. You can't stop a show." Calvin Harris, Biffy Clyro and Bruno Mars are headlining Big Weekend. There's more information on BBC Radio 1's Big Weekend Derry-Londonderry website. Follow @BBCNewsbeat on Twitter

AlunaGeorge and Angel Haze have pulled out of Radio 1's Big Weekend because of flight disruptions.

