The Vietnam war has been responsible for the development of numeruous new variants of old aircraft. Among them is the Martin B-57G, a Canberra modified for night intruder duties with advanced sensor systems. Twelve B-57Gs have been modified for the USAF and most serve with the 13th Tactical Bomb Squadron in Vietnam, where this picture was taken. The new nose fairing and chin radome contain a low-light-level TV, a laser range-finder, a forward-looking infra-red detection system and forward-looking terrain-following and ground-mapping radar.

The illustration taken during the 1923 Contest for the Schneider Trophy - the second time the event had been held in Britain, and the first to be won by the USA. Shown is the winning Curtiss CR-3, racing number 4, in which Lt David Rittenhouse, USN, achieved a speed of 177.38 mph (285,5 km/h).

The illustration taken during the 1923 Contest for the Schneider Trophy - the second time the event had been held in Britain, and the first to be won by the USA. Shown is the French CAMS 38 flying-boat of Lt de Vaisseau Hurel which completed only one lap of the course.

Formula I racing does not yet enjoy the support in Britain that it is given in the USA, but a start has been made. Pictured are the ill-fated Owl Racer (which crashed May 1971) leading a Cassutt Racer and a couple of Rollason Betas in one of the first UK Formula I events.