Rex Geveden, President of Teledyne Brown Engineering, makes a point during a press conference, Wednesday, May 4, 2011, to discuss NASA's Gravity Probe B (GP-B) mission which has confirmed two key predictions derived from Albert Einstein's general theory of relativity, which the spacecraft was designed to test at NASA Headquarters in Washington. The experiment, launched in 2004, 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. Photo Credit: (NASA/Paul E. Alers)

Rex Geveden, President of Teledyne Brown Engineering, makes a point during a press conference, Wednesday, May 4, 2011, to discuss NASA's Gravity Probe B (GP-B) mission which has confirmed two key predictions derived from Albert Einstein's general theory of relativity, which the spacecraft was designed to test at NASA Headquarters in Washington. The experiment, launched in 2004, 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. Photo Credit: (NASA/Paul E. Alers)

Seated from left, Bill Danchi, Senior Astrophysicist and Program Scientist at NASA Headquarters, Francis Everitt, Principal Investigator for the Gravity Probe B Mission at Stanford University, Rex Geveden, President of Teledyne Brown Engineering, Colleen Hartman, a research professor at George Washington University, and Clifford Will, Professor of Physics at Washington University in St. Louis, Mo., conduct a press conference, Wednesday, May 4, 2011, to discuss NASA's Gravity Probe B (GP-B) mission which has confirmed two key predictions derived from Albert Einstein's general theory of relativity, which the spacecraft was designed to test. at NASA Headquarters in Washington. Photo Credit: (NASA/Paul E. Alers)

KENNEDY SPACE CENTER, FLA. - Official portrait of Rex Geveden, NASA Associate Administrator. Rex Geveden is the associate administrator of the National Aeronautics and Space Administration. In this position, he is responsible for all technical operations of the Agency. He works directly with the Administrator to develop strategy and policy and has direct oversight of all NASA’s programs and field centers. Photo credit: NASA/Bill Ingalls.

JSC2006-E-28432 (18 July 2006) --- NASA associate administrator Rex Geveden speaks from a lectern in Ellington Field's Hangar 276 near Johnson Space Center during the STS-121 crew return ceremonies.

STS121-S-066 (17 July 2006) --- Dr. Michael Griffin (left), NASA administrator, and Rex Geveden (right), associate administrator, talk with STS-121 crew members Michael E. Fossum (left), mission specialist; and Steven W. Lindsey, commander, after the landing of the Space Shuttle Discovery and conclusion of mission STS-121. The crew of seven tested new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo Credit: NASA/Bill Ingalls

STS117-S-040 (8 June 2007) --- NASA Associate Administrator Rex Geveden watches the launch of the Space Shuttle Atlantis (STS-117) from the Launch Control Center at the Kennedy Space Center in Cape Canaveral, Fla. Atlantis lifted off from launch pad 39A at 7:38 p.m. (EDT) on Friday, June 8, 2007. Photo Credit: NASA/Bill Ingalls

JSC2006-E-28428 (18 July 2006) --- Johnson Space Center's (JSC) director Michael L. Coats speaks from a lectern in Ellington Field's Hangar 276 near JSC during the STS-121 crew return ceremonies. Seated from the left are astronauts Steven W. Lindsey, commander; Mark E. Kelly, pilot; Michael E. Fossum, mission specialist; NASA associate administrator Rex Geveden; astronauts Lisa M. Nowak, Stephanie D. Wilson and Piers J. Sellers, mission specialists. Photo credit: NASA

KENNEDY SPACE CENTER, FLA. - During the traditional post-flight walk-around after the landing of an orbiter, crew members Michael Fossum, mission specialist, and Steven Lindsey, commander, talk with NASA Administrator Mike Griffin (left). At right is Associate Administrator Rex Geveden. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett

STS121-S-067 (17 July 2006) --- (left to right) William H. Gerstenmaier, associate administrator for Space Operations; Rex Geveden, associate administrator; and Dr. Michael Griffin, NASA administrator, welcome home STS-121 crewmembers--Steven Lindsey, commander; Mark E. Kelly, pilot; and Michael E. Fossum, mission specialist--after the landing of the Space Shuttle Discovery and conclusion of mission STS-121. The crew of seven tested new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Photo Credit: NASA/Bill Ingalls

KENNEDY SPACE CENTER, FLA. - STS-121 Mission Commander Steven Lindsey is greeted by NASA Administrator Mike Griffin, Associate Administrator Rex Geveden, Shuttle Launch Director Mike Leinbach, KSC Deputy Director Bill Parsons and other senior managers after leaving the orbiter Discovery, in the background. The rest of the crew are Pilot Mark Kelly and Mission Specialists Piers Sellers, Lisa Nowak and Stephanie Wilson. Mission Specialist Thomas Reiter, who launched with the crew on July 4, remained on the station to join the Expedition 13 crew there. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - NASA Administrator Mike Griffin talks with Commander Steven Lindsey (gesturing) after the crew looked over the orbiter Discovery, above them. Between Griffin and Lindsey are Mission Specialists Michael Fossum and Lisa Nowak. Mission Specialist Stephanie Wilson is behind Lindsey; Associate Administrator Rex Geveden is at right. The post-flight walk-around is a tradition. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - (From left) STS-121 Mission Specialist Michael Fossum, Pilot Mark Kelly and Commander Steven Lindsey are greeted by NASA Administrator Mike Griffin (foreground, right), Associate Administrator Rex Geveden and other senior managers after leaving the orbiter Discovery, in the background. The rest of the crew are Mission Specialists Piers Sellers, Lisa Nowak and Stephanie Wilson. Mission Specialist Thomas Reiter, who launched with the crew on July 4, remained on the station to join the Expedition 13 crew there. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - (From left) Shuttle Launch Director Mike Leinbach, Associate Administrator for Space Operations Bill Gerstenmaier, Associate Administrator Rex Geveden and NASA Administrator Mike Griffin greet STS-121 Commander Steven Lindsey, Pilot Mike Kelly and Mission Specialists Michael Fossum and Stephanie Wilson. Not visible are Mission Specialists Piers Sellers and Lisa Nowak. Mission Specialist Thomas Reiter, who launched with the crew on July 4, remained on the station to join the Expedition 13 crew there. Discovery's smooth and perfect landing was on time at 9:14 a.m. EDT on Runway 15 of NASA's Shuttle Landing Facility after traveling 5.3 million miles on 202 orbits. Mission elapsed time was 12 days, 18 hours, 37 minutes and 54 seconds. The landing is the 62nd at Kennedy Space Center and the 32nd for Discovery. Photo credit: NASA/Kim Shiflett