An Afghan policeman has shot dead an American soldier and wounded three others in the southern province of Helmand. A member of the Afghan national police opened fire on the Americans on Thursday during a full scale scuffle in the provincial capital city of Lashkar Gah, located about 555 kilometers (344 miles) south of Kabul, a Press TV correspondent reported. The shooting marks the second incident of its kind in less than a month. On April 27, a veteran Afghan army pilot opened fire on foreign troops at Kabul airport, killing eight US-led soldiers and a contractor. Several US-led foreign...