Bin Laden's son may have been killed in strike

WASHINGTON - Saad bin Laden, a son of al-Qaida leader Osama bin Laden, may have been killed in a U.S. airstrike, U.S. officials said Thursday.

The son was likely killed in Pakistan in the last several months, approximately in late spring, said a counterterrorism official, one of three Obama administration officials who spoke on condition of anonymity to discuss intelligence.

Though many in the intelligence community believe he is dead, they can't be 100 percent certain because no body or DNA evidence was recovered to prove it, one official said.

US soldier killed in attack in Afghanistan

KABUL - A U.S. service member was killed Thursday in an insurgent attack in the country's volatile south, a U.S. military official said, raising to 35 the number of American troops to die in the Afghan war this month.

Also Thursday, two leading candidates in the Aug. 20 presidential election faced one another in an unprecedented television debate - which went ahead despite a decision by President Hamid Karzai not to take part.

Former foreign minister Abdullah Abdullah and ex-finance minister Ashraf Ghani both cited civilian casualties, searching private homes without permission and arresting people without cause as major reasons for opposition to the presence of U.S. and other international forces.

N.Korea out of options on nukes

PHUKET, Thailand - North Korea refused to re-enter talks to terminate its nuclear weapons program Thursday despite a united front of Asian nations spearheaded by U.S. Secretary of State Hillary Rodham Clinton to get it back to the bargaining table.

Warning that Pyongyang's nuclear ambitions could spark an arms race in the region, Clinton said the U.S. will continue to vigorously enforce tough U.N. sanctions, insist that it 'irreversibly denuclearize' and press for a return to so-called six-party negotiations.

But she held out the prospect of restoring U.S. diplomatic ties and other incentives - actions the Obama administration would be willing to consider if the North Koreans dismantle their nuclear program.