The mission will be a straightforward flight to the Red Planet and return without landing.
That left it free to return to its habit of landing troops on foreign shores.
It is the first US sample-return mission since the last Moon landing in 1972.
But when the puffins get used to human presence, they return to their normal routine, landing close by, their beaks brimming with slivers of transparent- and silver-covered food that contrast brilliantly with the bright red of the beak.
When he turned back to 1549 to instruct it to turn west, Sullenberger advised him he had lost power in both engines because of a bird strike and needed to return to LaGuardia for an emergency landing.
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The decision was taken to return to Exeter using the "alternate landing gear extension" procedure.
The astronauts aboard the Space Shuttle Discovery today used a computer simulator to practice landing in preparation for their planned return to Earth tomorrow.
That here we would be -- 40 years after the first moon landing -- still wondering when humans will return to the moon.
The LM was intended for two men (Lovell and Haise) to use in their landing on the lunar surface and then their return to the command module.
Investigators also concluded that if Capt Easson had tried to carry out a forced landing in a field rather than deciding to return to Glasgow Airport, "the outcome might have been different".
That will be followed by deployment of an unmanned lunar orbiter mission along with a nuclear-powered landing vehicle to support lunar rover delivery and sample return operations.
Professor Longuski discovered that the safest route to take would be one that permitted a quick return trip, via Venus, in case of an accident that forced the Mars landing to be aborted.
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