Anything Boeing, or Boeing owned, which includes McDonnell Douglas, Bell, Etc. and produces helicopters, space, misses, fighters, bombers airliners (of course) and any era. The field is huge and only limited by your imagination. The build would start on June 15 2015 - June 15 2016 to commemorate the 99th - 100th anniversary of Boeings first airplane the Model 1.