Four American soldiers were killed in a roadside-bomb explosion in eastern Afghanistan on Sunday, and two suicide bombers in a car blew themselves up next to the vehicle of the chairman of Afghanistan’s upper house of Parliament here in the capital, killing at least two people and wounding at least seven others, officials said. The Afghan official, Sebaghatullah Mojadeddi, escaped serious injury. He said he believed that the suicide attack was the work of Pakistan’s intelligence service. Full Story