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

They are the biggest purchaser of the revolutionary Osprey tiltrotor, which pivots its engines so it can take off like a helicopter, but fly as far and fast as a fixed-wing plane.

FORBES: The Deficit Commission's Assault On The Marine Corps

Part of that need will be met in the future by a new generation of rotorcraft, including the revolutionary MV-22 tiltrotor that combines the vertical agility of a helicopter with the speed and range of a fixed-wing plane.

FORBES: Marines Fight For Crucial Vehicle As Budget Cuts Loom

Five grand in the flying world is three months of fixed costs before I ever get the plane in the air.

FORBES: California's Almond Upside Surprise

Doctors do have an incentive to see these patients, even at a low payout, because they've already met their fixed costs--just like an airline selling cheap tickets right before the plane takes off.

FORBES: Public Health