In this 1966 file photo, U.S. Army helicopters providing support for U.S. ground troops fly into a staging area fifty miles northeast of Saigon, Vietnam. (AP Photo/Henri Huet)
American Troops Smoking Marijuana in Vietnam
In this 1966 file photo, U.S. Army helicopters providing support for U.S. ground troops fly into a staging area fifty miles northeast of Saigon, Vietnam. (AP Photo/Henri Huet)