The USAF was under fire at various times during the Iraq wars. During the first Iraq war, American and coalition forces lost about 75 aircraft to anti-aircraft fire, mostly from shoulder launched weapons. During the second war, American aircraft were under fire at various times, particularly helicopters, which experienced a number of losses. After American forces captured the Bagdhad airport, aircraft would take off and land under fire from various weapons. During Israels 2006 war, Hizbollah shot down an Israeli helicopter, but that pilot is no longer with us.
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from the article: U.S. official: Arming of Hezbollah could spark Israel-Syria war