Can you spot 10?

Flying Back to Bujumbura:  When the original blue sky began bubbling, it was time to redo the work.  The ruined pale blue tag board was replaced, but then a number of alterations naturally began to evolve.  See how many you can spot in the completed work.

 Flying to Bujumbura I

(12" x 18")

Flying to Bujumbura II

(14" x 22")