If there was only a lone gunman in the 6th floor of the TSBD (see photo above), why didn’t he shoot JFK’s limo as it approached towards him on Houston Street, where he would have enfilading fire (red arrows)? Instead, the shooting did not begin until JFKs limo had turned onto Elm Street where a large tree is blocking his line-of-sight. The Altgens photo proves the ambush began by other shooters in the Dal-Tex building, firing from a lower trajectory depicted by the green arrows. Later shots were fired from the west-end of the TSBD once the Limo moved past the tree (gold arrow).