Consumers can window shop on HealthCare.gov leading up to open enrollment, which starts Saturday. AP hide caption

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Under Kevin Counihan, Connecticut's health insurance exchange used concerts and storefront offices to reach customers. Courtesy of Chion Wolf/WNPR hide caption

itoggle caption Courtesy of Chion Wolf/WNPR

President Obama announced in early April that more than 7 million people had signed up for health insurance through the exchanges. Win McNamee/Getty Images hide caption

itoggle caption Win McNamee/Getty Images

Maritza Martinez worked with an insurance agent at a kiosk in a Miami mall to find the right health insurance plan for 2014. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images
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Oregon is still using paper applications to enroll people through the Affordable Care Act. iStockphoto hide caption

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Affordable Care Act navigator Nini Hadwen helps Floridians shop for health insurance in October. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

Doug Normington is 58, self-employed, and has diabetes. Courtesy of Doug Normington hide caption

itoggle caption Courtesy of Doug Normington

Health and Human Services Secretary Kathleen Sebelius testifies on Capitol Hill on Wednesday. Earlier today, Sebelius announced an inquiry into the agency's launch of the problem-plagued HealthCare.gov site. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP

Health and Human Services Secretary Kathleen Sebelius' shadow appeared behind the lectern as she spoke about the implementation of the federal health law in Detroit in November. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP
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The consumer-facing part of HealthCare.gov is working more smoothly, but how well the invisible back-end is working is unclear. NPR hide caption

itoggle caption NPR

Lara Imler has tried to cancel her enrollment on HealthCare.gov, but to no avail. Annie Feidt/Alaska Public Radio Network hide caption

itoggle caption Annie Feidt/Alaska Public Radio Network

Health and Human Services Secretary Kathleen Sebelius visits navigators helping enroll people on HealthCare.gov. Lynne Sladky/AP hide caption

itoggle caption Lynne Sladky/AP