The British government has summoned Russia's ambassador to the United Kingdom, asking him to explain why a pair of nuclear-capable Russian long-range "Bear" bombers had flown alarmingly close to U.K. airspace.

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The narrator of Rachel Cusk's new novel Outline is a novelist and divorced mother of two who has agreed to teach a summer course in creative writing in Athens. The novel itself is composed of some 10 conversations that she has with, among others, her seatmate on the plane flying to Greece, her students in the writing class, dinner companions and fellow teachers.

Three Americans who were working as contractors in Afghanistan died in a gunman's attack at the Hamid Karzai International Airport complex Thursday, according to the Associated Press.

The news agency adds:

"It was not immediately clear who did the shooting or whether the shooter was a member of the Afghan security forces.

"The U.S. defense officials spoke on condition of anonymity because the incident was in the early stages of investigation."

Sen. John McCain, R-Ariz., lashed out at anti-war demonstrators protesting the presence of former Secretary of State Henry Kissinger at a Senate hearing, calling them "low-life scum."

Kissinger, 91, and other former secretaries of state in both Republican and Democratic administrations, were at the Senate Armed Services Committee, which McCain chairs, for a hearing on global security challenges.

The Senate could vote as early as today on a bipartisan measure to approve the Keystone XL oil pipeline despite a veto threat from President Obama.

"The past few weeks have been a whirlwind. But the Keystone jobs debate has been important for the Senate and for our country," Senate Majority Leader Mitch McConnell, R-Ky., said before the vote. "The Keystone infrastructure project has been studied endlessly, from almost every possible angle, and the same general conclusion keeps becoming clear: Build it."

A treasure hunter, who located a sunken ship with perhaps the greatest loot in history but later disappeared in an alleged attempt to cheat investors and his crew of their cut, has been found. He is scheduled to appear in court next week in Florida, where authorities captured him earlier this week living in a $225-a-night hotel.

The American command in Afghanistan has for the first time in six years classified detailed statistics about the Afghan security forces — everything from equipment and training to attrition.

Gen. John Campbell, who is leading the NATO coalition's non-combat mission in Afghanistan, said he now considers all that sensitive operational information that could help the Taliban.

Campbell said he decided to classify details about the Afghan forces because they could be used by insurgent fighters to threaten both Afghan and U.S. forces.

Portugal's Cabinet approved a law today that would offer citizenship to the descendants of Sephardic Jews who were expelled, burned at the stake or forcibly converted to Christianity 500 years ago.

"I do not want to say this is an historic amendment because I believe that for this matter, there is no possibility to amend what was done," Portuguese Justice Minister Paula Teixeira da Cruz said, according to The Associated Press. "I would say it is the attribution of a right."

At the Cleveland Clinic's sprawling main campus, Morgan Clay is being discharged early one Tuesday afternoon.

Clay arrived a couple of weeks earlier suffering from complications related to acute heart failure. He's ready to go home. But before he can leave, clinic pharmacist Katie Greenlee stops by the room.

"What questions can I answer for you about the medicines?" Greenlee asks as she presents a folder of information about more than a dozen prescriptions Clay takes.

"I don't have too many questions," Clay says. "I've been on most of that stuff for a long time."

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