But engines are already operating at levels above 2, 500 degrees Fahrenheit, the melting point of the turbine blades that propel the plane, forcing engineers to dream up exotic cooling systems and turn to special coatings and unwieldy materials like ceramics.

FORBES: The Billion-Dollar Bet On Jet Tech That's Making Flying More Efficient

Plane travel, business lunches and dinners with clients, and conferences all require special planning for an employee with food allergies.

FORBES: Food Allergies in the Workplace are Not Always What They Seem

The members of the 75th Ranger Regiment -- a U.S. special operations force -- were training at Joint Base Lewis-McChord when they jumped from a plane and got entangled in towering evergreen trees that canvass the sprawling military installation between Tacoma and Olympia.

CNN: Army Rangers caught high and dry while parachuting