CAPE CANAVERAL, Fla. -- At Kennedy Space Center in Florida, NASA is hosting a two-day Tweetup for 150 of its Twitter followers of space shuttle Endeavour's STS-134 mission. A Tweetup is an informal meeting of people who use the social messaging medium Twitter. This Tweetup is an opportunity to learn more about NASA, explore Kennedy Space Center and experience a space shuttle launch. Actor_Director LeVar Burton, participating in the Tweetup is interviewed by Kennedy's News Chief Allard Beutel. Endeavour and its crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the International Space Station. Launch is scheduled for April 29 at 3:47 p.m. EDT. This will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts134_index.html. Photo credit: NASA_Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, Mallory Jennings and Heather Paul, aerospace engineers with Johnson Space Center's Spacesuit Life Support, perform a spacesuit demonstration during the STS-134 Tweetup event. About 150 people from 43 states, Washington, D.C., and half a dozen countries are participating in the event. A Tweetup gives followers of @NASA on the social messaging medium Twitter the opportunity to tour the center, view a shuttle launch and speak with NASA managers, astronauts, shuttle technicians and engineers. During the STS-134 mission, space shuttle Endeavour will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the International Space Station. Endeavour was scheduled to launch at 3:47 p.m. on April 29, but that attempt was scrubbed for at least 72 hours while engineers assess an issue associated with the shuttle's Auxiliary Power Unit 1. STS-134 will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts134_index.html. Photo credit: NASA_Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, Mallory Jennings, left, and Heather Paul, aerospace engineers with Johnson Space Center's Spacesuit Life Support, perform a spacesuit demonstration during the STS-134 Tweetup event. About 150 people from 43 states, Washington, D.C., and half a dozen countries are participating in the event. A Tweetup gives followers of @NASA on the social messaging medium Twitter the opportunity to tour the center, view a shuttle launch and speak with NASA managers, astronauts, shuttle technicians and engineers. During the STS-134 mission, space shuttle Endeavour will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the International Space Station. Endeavour was scheduled to launch at 3:47 p.m. on April 29, but that attempt was scrubbed for at least 72 hours while engineers assess an issue associated with the shuttle's Auxiliary Power Unit 1. STS-134 will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, Mallory Jennings, left, and Heather Paul, aerospace engineers with Johnson Space Center's Spacesuit Life Support, perform a spacesuit demonstration during the STS-134 Tweetup event. About 150 people from 43 states, Washington, D.C., and half a dozen countries are participating in the event. A Tweetup gives followers of @NASA on the social messaging medium Twitter the opportunity to tour the center, view a shuttle launch and speak with NASA managers, astronauts, shuttle technicians and engineers. During the STS-134 mission, space shuttle Endeavour will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the International Space Station. Endeavour was scheduled to launch at 3:47 p.m. on April 29, but that attempt was scrubbed for at least 72 hours while engineers assess an issue associated with the shuttle's Auxiliary Power Unit 1. STS-134 will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, Mallory Jennings and Heather Paul, aerospace engineers with Johnson Space Center's Spacesuit Life Support, perform a spacesuit demonstration during the STS-134 Tweetup event. About 150 people from 43 states, Washington, D.C., and half a dozen countries are participating in the event. A Tweetup gives followers of @NASA on the social messaging medium Twitter the opportunity to tour the center, view a shuttle launch and speak with NASA managers, astronauts, shuttle technicians and engineers. During the STS-134 mission, space shuttle Endeavour will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the International Space Station. Endeavour was scheduled to launch at 3:47 p.m. on April 29, but that attempt was scrubbed for at least 72 hours while engineers assess an issue associated with the shuttle's Auxiliary Power Unit 1. STS-134 will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov_mission_pages_shuttle_shuttlemissions_sts134_index.html. Photo credit: NASA_Jack Pfaller

CAPE CANAVERAL, Fla. -- About 150 people from 43 states, Washington, D.C., and half a dozen countries participate in the STS-134 Tweetup event at NASA's Kennedy Space Center in Florida. A Tweetup gives followers of @NASA on the social messaging medium Twitter the opportunity to tour the center, view a shuttle launch and speak with NASA managers, astronauts, shuttle technicians and engineers. During the STS-134 mission, space shuttle Endeavour will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the International Space Station. Endeavour was scheduled to launch at 3:47 p.m. on April 29, but that attempt was scrubbed for at least 72 hours while engineers assess an issue associated with the shuttle's Auxiliary Power Unit 1. STS-134 will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

NASA Twitter followers, who particiapted in the STS-134 Tweetup are seen together by the launch clock, Friday, April 29, 2011, at Kennedy Space Center in Cape Canaveral, Fla. About 150 NASA Twitter followers attended the event. Later the group will watch the launch of Endeavour as it heads to the International Space Station on a 14-day mission to deliver the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre. Liftoff is targeted for 3:47 pm. Photo Credit: (NASA/Paul E. Alers)