FT. IRWIN, CA -- The air conditioning in the tactical operations center was down. Lt. Col. Michael Wechsler, leader of 2nd Squadron, 11th Armored Cavalry Regiment, sweated through the last battle briefing of the day on the eve of Project Convergence Capstone 6 (PCC6), July 19. The sun had finally begun to relent across the desert horizon. The enemy, however, would not. The 4th Infantry Division would push hard through the night, Wechsler suspect…