From left, Cheryl Campbell, senior vice president of CGI Federal; Andrew Slavitt, group executive vice president for Optum/QSSI; Lynn Spellecy, corporate counsel for Equifax Workforce Solutions; and John Lau, program director for Serco, listen to questioning on Capitol Hill in Washington, Thursday, Oct. 24, 2013, during a House Energy and Commerce Committee hearing with contractors that built the federal government's health care websites. The contractors responsible for building the troubled Healthcare.gov website say it was the government's responsibility _ not theirs _ to test it and make sure it worked. (AP Photo/ Evan Vucci)

Photo by: Evan Vucci

From left, Cheryl Campbell, senior vice president of CGI Federal; Andrew Slavitt, group executive vice president for Optum/QSSI; Lynn Spellecy, corporate counsel for Equifax Workforce Solutions; and John Lau, program director for Serco, listen to questioning on Capitol Hill in Washington, Thursday, Oct. 24, 2013, during a House Energy and Commerce Committee hearing with contractors that built the federal government's health care websites. The contractors responsible for building the troubled Healthcare.gov website say it was the government's responsibility _ not theirs _ to test it and make sure it worked. (AP Photo/ Evan Vucci)