The killings are the latest incident fueling outrage in Afghanistan, following accidental Quran burnings and the desecration of corpses.

"The person that was involved obviously has to be brought to justice and brought to justice quickly," candidate Santorum said.

The United States and the European Union both claimed victory in the long-running dispute over subsidies to aircraft manufacturers.

Nearly 60 percent of all Americans surveyed in the poll think the war in Afghanistan is no longer worth fighting. 

The former head of Israel’s spy agency believes that an Israeli attack on Iran would be a mistake now that could have severe consequences for Israel.

Meir Dagan, who ran Israel’s Mossad from 2002 to 2010, said in a “60 Minutes” interview that he does not believe Israel should be attacking Iran to stop Tehran’s nuclear program.

Officials worked quickly to calm tensions after an American service member opened fire on Afghan civilians Sunday

McCain said that if the situation in Afghanistan is allowed to deteriorate, the country could "easily" become an al-Qaeda base. 

The administration has shown both concern over Republican attacks on policies to Israel, and confidence Obama can win the debate.

Gingrich said Sunday he held a view "much more pessimistic than Washington's official position."