1.   The plane flew so low that Geoff swears he saw one wing touch the top of a tree.

2.   As the aeroplane went down the runway, the wing touched a pile of rubble.

3.   Their wings touched, and both jets crashed.

4.   While the cause of the crash has not been identified, witnesses said a wing touched the ground just before the crash.

5.   Witnesses said a wing touched the ground just before the plane crashed.

6.   Maybe the wings touched.