The engineering requirements, which are part of our contract, are written around the most austere operating environments--both hot and cold--in the world. They were written specifically by the three U.S. services that have to operate aircraft in those environments, and the requirements of the partner nations were integrated into that. Long before you take delivery of it, we will test the airplane down to temperatures that are both well above and well below what you'll see in operational service.
On December 2nd, 2010. See this statement in context.