WASHINGTON, Nov 10 (Reuters) - The Federal Aviation

Administration said late on Monday it had staffing issues at

nearly two dozen air traffic facilities across the United States

despite President Donald Trump's demand that controllers

immediately return to work.

The FAA has imposed ground delay programs due to staffing

issues at airports in Houston and Las Vegas and is slowing

flights in Florida. Airlines have canceled nearly 2,200 flights

and delayed more than 7,200 on Monday, according to FlightAware,

a flight tracking website.