"From what I've read about the unpleasantness in sunny SEA, this is a crude way to point out where 'INCOMING' was coming from for the Spooky crews and anyone else providing air support when radio contact couldn't be made with the ground troops in the Special Forces camp.  The 'flower boxes' forming an arrow were filled with dirt which was soaked with diesel fuel or mogas, which was set ablaze after being pointed towards the bad guys."

Mrs. Gifford adds that this photo was taken at Luong Son.