Just before we climbed into the Porter, Mr. Yusaf explained how to sit on the edge of the plane once the hatch was open and showed me how to tuck my feet underneath the fuselage.

WSJ: Sky-Diving in New Zealand

He flew the X-15 rocket plane to the edge of space - 200, 000 feet up at 4, 000 mph.

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Their Dornier 288 plane tracked the edge of the plume over East Anglia and the North Sea, and towards the Dutch coastline.

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The main investigation, which also involves the FAA and Boeing, focuses on the 787's cutting-edge lithium ion battery system that powers the plane's auxiliary power unit.

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Once that was done, he set to the real work: with hand drills, handsaws (their teeth rubbed, to run more smoothly, with a candle end), his bevelled-edge chisel and his wide, heavy, trusty Number 7 plane, which he used for everything.

ECONOMIST: Alan Peters

Visitors can see the falls from many vantage points: above from a helicopter or microlight fixed wing plane, at eye level walking across the Knife Edge Bridge that spans the width of the falls on the Zambian side, or from below on a hike.

BBC: Livingstone��s Zambia

Before being chosen in 1962 as one of the "Group II" astronauts -- which included Apollo 13 commander James Lovell along with such legends as Frank Borman, Pete Conrad and John Young -- Armstrong was one of the elite pilots selected to fly the X-15 rocket plane up to five times the speed of sound and toward the edge of space.

CNN: Neil Armstrong, a hero who shunned fame

When one row on one side blows air at a higher pressure than the other it causes the airflow over the trailing edge on that side to bend up or down, in exactly the way that an aileron would, and the plane rolls accordingly.

ECONOMIST: How to fly without ailerons