A Yemeni court sentenced two men to five years in jail on Sunday for trying to kill the former U.S. ambassador to the Arab country with a hand grenade in 2004. Houzam al-Maas and Khalid al-Halilah, who had faced a maximum jail term of 10 years for trying to throw a hand grenade at the envoy as he was entering a shop, can appeal their sentence, their lawyers said.Maas had pleaded guilty to attempting to kill the ambassador, but told the state security court he was psychologically ill. Halilah, a taxi driver, had pleaded not guilty, saying he only drove Maas to a weapons market.