At least 42 U.S. military aircraft have been lost or damaged since the start of the war with Iran, according to a recent analysis that compiled news reports and officials' statements to tally losses. The Congressional Research Service report comes as lawmakers push Pentagon leaders for more clarity on timelines, costs and outcomes pertaining to Operation Epic Fury. Pentagon acting comptroller Jules Hurst testified to Congress this month that the estimated cost of military operations in Iran had reached $29 billion. The figure includes equipment repair and replacement costs but does not account for damage to U.S. military bases in the Middle East that came under retaliatory attack by Iran, Hurst said. Joint American-Israeli strikes Feb. 28 against Tehran started the war. During the conflict, the U.S. has lost 24 MQ-9 Reaper drones, according to the Congressional Research Service. The drones cost about $30 million apiece and can carry as many as 16 Hellfire missiles.