Team fired 300 rounds in border shootingWESLACO — Answering a smattering of gunshots with a 300-round barrage should show drug runners - their inflatable rafts full of illegal contraband - that Texas law enforcement officers aren't messing around, authorities said. "You shoot a police officer, you're going to be shot back at," said Department of Public Safety DirectorSteve McCraw, dismissing on Friday any notion that the U.S. response to an early morning shootout Thursday with Mexican drug runners on the Rio Grande was over the top. An initial DPS news release said the U.S. officials came under "heavy gun fire."...