1. Conversely, light jets are smaller, can carry fewer passengers and have a more restricted flying range.

2. The new jet technology, which allows larger passenger aircraft, longer flying range and greater fuel efficiency, reduced the cost of travelling by air.

3. With their aircraft stripped of armament — to save weight and to keep them from straying into combats — and loaded with enough extra fuel to extend their flying range to four or five hours, pilots took photos of everything from airfields to minefields, from gun emplacements to basic topographical data for overprinted maps.