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NASA Events:

Endeavour Slated to Launch Monday, May 16

NASA managers have set the liftoff of space shuttle Endeavour for 8:56 a.m. EDT on Monday, May 16. Launch attempts are available through May 26 with the exception of May 21.

› Space Shuttle Section | › Video: First Family Visit | › Gallery: President Obama at KSC

NEEMO: NASA Extreme Environment Mission Operations

NEEMO provides an undersea parallel to space exploration, with crewmembers experiencing tasks similar to those they face in space. Watch live as preparations continue for this week's engineering tests.

› Watch Live | › NEEMO Section

Images of tornado damage near Tuscaloosa, Ala., seen on May 4, 2011.

NASA Satellite Observes Damage Path of April Tornados in Alabama

NASA's Terra satellite, part of NASA's Earth Observing Satellite system, captured images of the April 27 storm damage path. ASTER, an instrument aboard Terra, captured the images show the scars from the outbreak.

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Take a Peek Behind the Scenes at NASA this Weekend

NASA Goddard in the Baltimore-Washington area and NASA JPL in the Greater Los Angeles area are open this weekend to the public for tours, kids' activities and a peek at NASA's science missions.

› NASA Goddard Open House Info | › NASA JPL Open House Info→

NASA Selects Investigations for Future Key Planetary Mission

The three science investigations from which NASA will pick one potential 2016 mission look at Mars' interior for the first time; study a sea on one of Saturn's moons; or study in unprecedented detail the surface of a comet's nucleus.

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NASA's Gravity Probe B Confirms Two Einstein Space-Time Theories

The experiment used four ultra-precise gyroscopes to measure the hypothesized geodetic effect, the warping of space and time around a gravitational body, and frame-dragging, the amount a spinning object pulls space and time with it as it rotates.

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50th Anniversary of Alan Shepard's Flight

Alan Shepard: First American In Space

Explore Mercury astronaut Alan Shepard's history-making mission through video, documents and graphics from the mission, and interactive models of the Mercury-Redstone rocket and Freedom 7 capsule.

› Interactive Feature | › Administrator Bolden's Blog | › Video: Ambassador of Exploration | › NASA Milestones

NASA Images

STS-133 commander Steven Lindsey, far left, presents a montage to President Barack Obama as crew members Michael Barratt, pilot Eric Boe, Nicole Slott and Steve Bowen look on during a visit to the Oval Office, Monday, May 9, 2011, in Washington.

President Obama Meets With...

STS-133 commander Steven Lindsey, far left, presents a montage to President Barack Obama as crew members Michael Barratt, pilot Eric Boe, Nicole Stott...