Mod 12 uses an internal guidance system and can glide to its target. On 1 July 2015, the National Nuclear Security Administration (NNSA) conducted the first of three flight tests of the Mod 12 tail kit assembly. According to the Federation of American Scientists in 2012, the roughly 400 B61-12s will cost $28 million apiece. See also List of nuclear weapons Joint Direct Attack Munition B61 Family Weapons Storage and Security System B83 nuclear bomb WE.177 Notes References External links . . . , an anti-nuclear weapons organization . . . Nuclear bombs of the United States Tactical nuclear weapons Military equipment introduced in the 1960s