Update for 5-9-2016

Updated the entry for X-551E with some new information and a photo of a C-6 Challenger like the one A.H. Kreider was flying when he collided with the Ranger monoplane.

Fairchild KR-21 (aka Kreider-Reinser Challenger C-6) - Wikimedia Commons, photo by William "Bill" Larkins

Also have new information on the other two LC-11 monoplanes, X7997 and X889E, unfortunately, it seems the records for the two ships were combined together in the entries for X7997 so I'll be doing a little bit of research to determine which record goes where.