AirForceTimes.comBattle over Air Force's $1300 coffee cups heats upAirForceTimes.comThe Air Force, under fire for throwing down $1,280 apiece to replace in-flight reheating cups after their handles break, is pledging to use 3-D printing to get that replacement cost down to 50 cents. But Sen. Chuck Grassley, R-Iowa, is still wondering ...and more »