"I apologize," Health and Human Services Secretary Kathleen Sebelius said Wednesday at a congressional hearing on problems with HealthCare.gov. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

One person who got a letter canceling his health insurance was Rep. Cory Gardner, R-Colo. He holds up the letter during a congressional hearing Wednesday on insurance problems. He says his family chose to buy private insurance rather than use the congressional plan. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Marilyn Tavenner was the first Obama administration official to testify before Congress about the troubled launch of HealthCare.gov. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Sen. Mark Begich of Alaska is one of five Democrats in the Senate calling for a delay in the enrollment deadline for the Affordable Care Act. He says consumers shouldn't be punished for the technical problems that have plagued the health law's website. Win McNamee/Getty Images hide caption

itoggle caption Win McNamee/Getty Images

Gone is the smiling young woman who used to grace HealthCare.gov. Now it's time to get down to work. www.HealthCare.gov hide caption

itoggle caption www.HealthCare.gov

An attempt to draw out the various parts of HealthCare.gov's tech system, based on the testimony of its contractors. Elise Hu/NPR hide caption

itoggle caption Elise Hu/NPR

Not all glitches are unintentional and problematic. Glitch art introduces, on purpose, digital typos that would otherwise be edited out in an image. Kevin Wong/Flickr hide caption

itoggle caption Kevin Wong/Flickr

Heavy Internet traffic and system problems plagued the launch of the new HealthCare.gov insurance exchange site. Karen Bleier/AFP/Getty Images hide caption

itoggle caption Karen Bleier/AFP/Getty Images

HealthCare.gov has been plagued with problems since the health insurance exchange site opened Oct. 1. Karen Bleier/AFP/Getty Images hide caption

itoggle caption Karen Bleier/AFP/Getty Images