Afghan Troops Again Turn Guns on U.S.

May be time for another apology.

CBS News) KABUL - Two U.S. troops have (sic) were shot dead by three Afghan gunmen Thursday at their base in the southern Kandahar province, and two of the three shooters were Afghan National Army soldiers - another blow to a U.S. strategy pinned on direct partnership with Afghan forces.

The two Afghan troops who opened fire were killed by U.S. troops, and a third shooter, a teacher at the joint U.S.-Afghan base, was wounded.