Russian invasion of Ukraine and will likely avoid using DPICM in most cases. Large quantities of munitions bought during the Cold War were put into war reserve stockpiles. However, as of 2014 many were reaching the end of their useful life and required disposal, an expensive process. The warheads, which are now old and less stable, must be extracted. The shells are being refilled with explosives, recycling them for use as inexpensive training ammunition. One such round is the M1122, built from recycled shell casings from DPICM rounds that have some explosive filling replaced with concrete. As a training round, the M1122 has one-seventh the explosive impact at one-third the cost of a standard M795 high-explosive shell. The U.S. Army is seeking a replacement of DPICMs from the Alternative Warhead Program (AWP). The AWP warheads have equal or greater effect against materiel and personnel targets, while leaving no unexploded ordnance behind. The program is being developed by Lockheed Martin and Alliant Techsystems and the first AW rockets were ordered in September 2015. References Artillery ammunition Cluster munition Military equipment introduced in the 1960s