the time and it would not come to light until a 1989 US DoD report revealed that one of these one-megaton bomb (which had recently been retired from service and replaced) had gone missing. Japan then asked for details of the incident. Withdrawn The B43 was phased out in the 1980s, and the last B43 weapons were retired in 1991 in favor of the newer B61 and B83 weapons. See also B83 nuclear bomb B61 nuclear bomb List of nuclear weapons Tsetse primary References External links Allbombs.html data page at nuclearweaponarchive.org Video showing shipboard handling procedures for the B43 bomb Cold War aerial bombs of the United States Nuclear bombs of the United States Military equipment introduced in the 1960s