Published: Nov 21, 2010 3:24 AM EST
Updated: Nov 21, 2010 12:24 AM EST

CHICAGO (AP) - The busiest travel day of the year could get even busier this year.
      
On the day before Thanksgiving, airports could see even more than the usual disruptions because of a loosely organized Internet boycott of full-body scans by fed-up travelers.

Body scans take as little as 10 seconds. But people who decline the process must submit to a full pat-down, which takes much longer. That could cause a cascade of delays at dozens of major airports.
      
Even if only a small percentage of passengers balk, experts say it could mean longer lines, bigger delays and hotter tempers.
      
President Barack Obama is expressing sympathy for frustrated travelers. The president, at the NATO summit in Lisbon, says he's asked security officials whether there's a less intrusive way to screen U.S. airline passengers. He says he's been told that for now - there isn't one.