Interwar upgrades The M1A2 was a further improvement, with a commander's independent thermal viewer and weapon station, position navigation equipment, digital data bus and a radio interface unit. Further upgrades included depleted uranium armor for all variants, a system overhaul that returns all A1s to like-new condition (M1A1 AIM), a digital enhancement package for the A1 (M1A1D), a commonality program to standardize parts between the U.S. Army and the Marine Corps (M1A1HC) and an electronic upgrade for the A2 (M1A2 SEP). During Operations Desert Shield and Desert Storm and for Bosnia, some M1A1s were modified with armor upgrades. Afghanistan/Iraq Wars M1 Abrams Further combat was seen during 2003 in Iraq and Afghanistan. As of March 2005, approximately 80 Abrams tanks were forced out of action by enemy attacks. The campaign in Iraq saw very similar performance from the tank from the Persian Gulf war, with no Abrams crew member being lost to hostile fire during the invasion of Iraq, although several tank crew members were later killed by snipers and roadside bombs during the occupation that followed. Abandoned Abrams were purposely destroyed by friendly fire to prevent recovery of vehicle or technology. Damage by 25 mm AP-DU, anti-armor RPG fire and 12.7 mm rounds was encountered. But on no occasion did anti-tank guided weapons or anti-tank mines strike the US MBTs. The most lopsided achievement of the M1A1s was the destruction of seven T-72 Lion of Babylon tanks in a point-blank skirmish (less than ) near Mahmoudiyah, about south of Baghdad, with no losses for the American side. However, on 29 October 2003, two soldiers were killed and a third wounded when their tank was disabled by an anti-tank mine, which was combined with other explosives (, including several 155 mm rounds) to increase its effect. The massive explosion beneath the tank knocked off the turret. This marked the first time deaths resulted from a hostile-fire assault on the M1 tank from enemy forces. The M1A3 Abrams is in the early design period with the U.S. Army. The Army aims to build prototypes by 2014 and to begin to field the first combat-ready M1A3s by 2017. The Army anticipates that the Abrams may remain in U.S. service until 2050. The U.S. Army's Future Combat Systems' XM1202 was to replace the Abrams and was in development when funding for the program was cut from the DoD's budget. The Army is tentatively