Who is responsible for Obamacare website fiasco?

Another Obamacare website failure.

A malfunction crashed the site Sunday, just one day after Health and Human Services Secretary Kathleen Sebelius praised the very same component that crashed as a "model of efficiency and security".

That particular malfunction was fixed, but no one is taking responsibility for all that's gone wrong with the web site.

So where does the buck stop?

It's hard to figure out.

Tom Foreman investigates for OutFront.