A black and white photograph of Lt. Col Colin Khan Commandig Officer of 5 RAR with Duc Thanh District Chief Maj Tram Van Ngo and the Senior American Adviser Captain Robert P Heath walk through the rubber after inspecting the site of a successful ambush on the cordon sitephotograph, lt col colin khan, maj tram van ngo, capt robert p heath (us), 5 rar, gibbons collection catalogue