It was for the 68th Doolittle Reunion on April 17th & 18th, 2010 at USAF Museum, Wright Field Dayton OH.
The 17 B-25's and crew formed up for a fly-over the Doolittle Memorial ceremony -- the largest B-25 flyover since the war. Only 8 Doolittle Raiders, of the original 79 remain, and of those only 4 were able to attend the 2010 event. The oldest airman present was 94 years old and the youngest 88.
The air to air shots were filmed from the tail gunner seat of 'Pacific Princess', ship # 2 in the 17
ship formation. The opening landing is at the Champaign Airport in Urbana, Ohio, 12 miles away, which is where the B-25's parked.
Click this link for the video.
http://www.youtube.com/user/MsPolleyVision