By Chris Francescani NEW YORK (Reuters) – Americans with accounts on President Barack Obamas health insurance enrollment website, HealthCare.gov, were advised that their passwords had been reset to guard against the Heartbleed bug, in a message posted on the site on Saturday. The warning marks the latest fallout from the widespread security bug, which surfaced this month and allows hackers to steal data online without a trace. Companies from Amazon.com Inc to Google Inc. have been forced to take steps to protect against Heartbleed. HealthCare.gov, a health insurance exchange for the 36 states that opted out of creating their own state insurance exchanges, was created under Obamas signature health care law, the 2010 Patient Protection and Affordable Care Act.