Michael Griffin addresses the media during his first press conference as NASA Administrator, Monday, April 18, 2005, at NASA Headquarters in Washington, DC. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin addresses the media during his first press conference as NASA Administrator, Monday, April 18, 2005, at NASA Headquarters in Washington, DC. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin addresses the media during his first press conference as NASA Administrator, Monday, April 18, 2005, at NASA Headquarters in Washington, DC. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin addresses the media during his first press conference as NASA Administrator, Monday, April 18, 2005, at NASA Headquarters in Washington, DC. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin addresses the media during his first press conference as NASA Administrator, Monday, April 18, 2005, at NASA Headquarters in Washington, DC. Photo Credit: (NASA/Renee Bouchard)

Michael Griffin addresses the media during his first press conference as NASA Administrator, Monday, April 18, 2005, at NASA Headquarters in Washington, DC. Photo Credit: (NASA/Renee Bouchard)