New stamps honor America's early space exploration; Another possible delay for Endeavour

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TUCSON, Ariz. -- A couple of new stamps offered by the postal service are out of this world.

Wednesday the Tucson postal museum honored 50 years of space flight by unveiling the new stamps with astronaut Alan Shephard on one and the project Mercury on the other.

"We're very fortunate here to have the postal history museum who sponsors a lot of these unveilings, we do one or two of these a year for new stamps to come out and its a great resource to the postal museum and all the volunteers here," said Tucson Post Master Carl Grigel.

Thursday marks the 50th anniversary of Shepard's "Freedom 7" mission,  America's first manned space flight.

And there's another possible delay for Space Shuttle Endeavour.

Problems last Friday with fuel-line heaters prompted NASA to postpone the space shuttle's launch until at least Tuesday.

Now NASA reports a blown circuit in a switch box could push back the mission well into next week.

Congresswoman Gabrielle Giffords' husband Mark Kelly will command Endeavour's final voyage.

Giffords plans to return to Florida to watch the launch once it is rescheduled.