Activision released new screens from the PC, X360 and NDS versions of Call of Duty 4: Modern Warfare, the latest installment in the Call of Duty series, scheduled to be released this fall, for PC, Xbox 360 and PS3. In the works at Infinity Ward, the game promises to arm gamers with the most advanced and powerful arsenal of modern day firepower to fight a new war in the world’s most treacherous hotspots.