motorists. some drivers have been killed and investigators investigating the accidents say it looks like victims. >> reporter: stabbed or shot from the air bags. breaking news overnight a pair of car bomb attacks. in somalia's capital. that's 80 unitthe united nation embassies are based. at least three workers and one security worker reported dead. six people were killed following an attack in yemen. this happened outside the residence of the newly appointed iranian ambassador. no word who is behind either one of these attacks. a sad story. the national transportation safety board investigating the cause of a fatal collision between two school busses in knoxville, tennessee, carrying elementary school students two young girls and a teacher's aide killed in the collision. nearly two dozen children were treated at area hospitals. police say the buss were