The test is a success, and the flight marks the first use of a modern American aviation oxygen mask.

The flight marked the first American orbital mission to involve in-flight fatalities.

The flight marked the first time an orbital manned space vehicle had been re-flown with a second crew.

A flight of vivid green streaks marked a flock of lake ducks coming for a morning feeding.

Arguably, further white flight would merely mark another phase in the city's evolution.

The flight marked the 10th anniversary of Benito Mussolini's rise to power.

The flight marked the beginning of a flight test programme involving 1,200 airborne hours on 530 flights.

The flight marked the end of an era at the Cape.

The flight marked the return of the Soviets to manned space operations after the 1971 accident.

As a result, the first flight of the Endeavour, which began Thursday, marks a bittersweet moment in shuttle history.