The deadliest incident for the DEA occurred August 27, 1994, when a plane carrying five special agents crashed in the Peruvian Andes during a reconnaissance mission, according to the DEA's Web site.

CNN: STORY HIGHLIGHTS

"We know there's pressure to make that plane or you're traveling with family or bringing special foods you don't want to get squished, " said Fitzpatrick.

CNN: Don't be a jerk en route to turkey dinner

Problems arose, after the couple boarded the plane, when the crew realised that the aircraft's special medical seats were not adequate.

BBC: NEWS | UK | England | Tees | Legal action over plane seat lost

This is a special type of Earth model which traces its idealised "horizontal" surface - the plane on which, at any point, the pull of gravity is perpendicular to it.

BBC: Europe's Goce satellite probes Earth's gravity

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

Such was the case with, Jessica whose airplane was fitted with special controls and a booster seat to help the 4-foot-2-inch girl pilot the plane.

CNN: Crash of child pilot prompts review of FAA guidelines