This is a B-25 flying off the USS Hornet (CV-8) on 18 April 1942. B-25s were Army bombers. They were not supposed to be able to fly off the deck of an aircraft carrier. But they did. Jimmy Doolittle and his men made it work, with the help of Hornet's crew.
USS Hornet, the first aircraft carrier and eighth naval vessel of that name, was sunk 27 October 1942, Battle of Santa Cruz. USS Hornet (CV-12), the second carrier of that name, went into action November 1943.
CBS News story about the raid.
Wikipedia article about the Doolittle Raid.
About the B-25B medium bombers.
US Navy official page of photos of USS Hornet and the Raid.
Art of the Doolittle Raid - some accurate, some highly imaginative.
Biography of Lieutenant General James Doolittle, Medal of Honor.
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B-25B line art from: Rickard, J (6 February 2007), North American B-25B: Top Plan, http://www.historyofwar.org/Pictures/pictures_B-25B_top.html