It’s great to see photos of TET, in the photo from the Free World building it shows the rifle position on the first floor where I sat with quaking knees. The photo showwing the rooftop guard was also the location of the only casualty taken at the Canberra, A group of Sigs were on the roof watching the progress of ARVN down Nguyen Trai street that runs beside the BEQ, there was a serious firefight very closeby in buildings to the northeast (there is film evidense of the severity of the fighting on nearby rooftops available) while taking cover the troops noticed one of their group was missing! Looking around they found one member laid out on the ground, wounded!! Time to go! With their wounded comrade they left the fighting to see to their injured.