The General Accounting Office yesterday told House lawmakers it uncovered no legal problems with the Defense Department's display of military equipment at last July's Republican National Convention in Philadelphia. "We are aware of no legal prohibition against the display of military equipment at the former Philadelphia naval base," according to an Oct. 18 letter GAO sent to House Appropriations Committee Ranking Member David Obey (D-WI) and Reps. Peter DeFazio (D-OR) and Pete Stark (D-CA). "Because the display provided an opportunity...