ABC News' David Chalian and Karen Travers report: Department of Homeland Security Secretary Janet Napolitano offered this explanation of Vice President Biden's remarks this morning that Americans should avoid subways or commercial flights because of the flu. "I think the vice president if he had, if he could say that over again he would say if they’re feeling sick they should stay off of public transit or confined spaces because that is indeed the advice that we’re giving," Napolitano said on MSNBC.
On Radio Iowa this morning, Sen. Tom Harkin, D-Iowa, was less forgiving. "Well, I think that's a very unfortunate statement by the vice president. We just don't need that type of misinformation going out. I wish the vice president had checked with the center for disease control and preparedness before he made that statement," said Harkin . "As far as not riding on subways or planes, we're not going to shut down our system and that doesn't get to the nub of the problem anyway, so I think that's very unfortunate that this kind of misinformation got out." -- David Chalian and Karen Travers