Photo G0684: Construction of the new operations bunker at B Company, 720th MP Battalion, Outpost #2, Long Hung Vietnam, in May 1968. The ground was so hard that C4 plastic explosive had to be used to loosen the hard pack clay to dig the bunker pit. Courtesy of CPL Thomas T. Watson, B Company, 720th MP Battalion, 89th MP Group, 18th MP Brigade, March 1968 to March 1969.