Sometimes, Trump ultimately defuses such flaps by saying he was only joking.

Inflating the air chamber forces the fins to bend -- similar to the down stroke when a manta flaps its fins.

The museum’s website details the plane’s rich history and how it was built with inventive flaps and cables.

A large red Shia flag flaps in the wind nearby - it is almost the only sound in the largely abandoned town.

He said it was possible in some patients to leave thicker flaps, but that did not mean leaving breast tissue behind.