87,000 U.S. weapons bought for Afghan government unaccounted for , report says . The Pentagon has said it is investigating the missing weapons. 135,000 weapons bought from other countries also missing , report says .
87,000 U.S. weapons bought for Afghan government unaccounted for , report says . General Accountability Office cites `` lapses '' in supply chain . 135,000 weapons bought from other countries also missing , report says .