Contractors who worked on the much-maligned US healthcare website have told lawmakers the Obama administration must share the blame for its glitches.
One senior executive said in testimony to a congressional panel that the federal government was "the ultimate responsible party".
The panel also heard two contractors had wanted further testing before the 1 October launch of the website.
The Obama administration is in damage-control mode over the troubled rollout.
The fallout led the White House late on Wednesday to announce that it would push back by six weeks the healthcare law's requirement for individuals to buy insurance or face a tax penalty.
http://www.bbc.co.uk/news/world-us-canada-24658892