With the rollout of HealthCare.gov -- the portal for enrollment in the new Obamacare health care exchanges -- getting hammered by critics and users, CNN's Dr. Sanjay Gupta sat down with Health and Human Services Secretary Kathleen Sebelius for an exclusive interview. Here are Gupta's takeaways from the interview: 1. Full speed ahead I was surprised to learn just how extensive the concerns were before the October 1 rollout. Congressional investigators claim that just weeks before the planned rollout, more than two-thirds of insurers had concerns about the system being viable by October 1. Just days before the launch, the website crashed while being tested with just a few hundred people logging in, according to the Washington Post. Despite all that, the White House decided to move forward. When I pressed Sebelius on this point, she said, We moved forward because millions of people have been waiting for health care insurance, and they did n't want to delay any longer. Sebelius on the spot over Obamacare rollout She made that point a few times: A few weeks wo n't make that much of a difference given that open enrollment lasts until the end of March, and that millions more people could have health insurance by that time. 2. Obama did n't know ? According to Sebelius, President Barack Obama was not aware of any significant problems until a couple days after the website had been