Mathews suggests the risk of nuclear terrorism remains unprevented. In 1999 during the Kosovo War, the U.S. supported the Kosovo Liberation Army (KLA), though it had been recognised as a terrorist organisation by the U.S. some years prior. Right before the 1999 bombing of Yugoslavia took place, the U.S. took down the KLA from the list of internationally recognized terrorist organizations in order to justify their aid and help to the KLA.