Potential safety issues at Las Vegas Harry Reid International Airport have been uncovered by a federal review into the January mid-air crash between a military helicopter and a passenger jet in Washington,

A federal review of helicopter safety around some of the busiest U.S. airports has revealed dangerous flying conditions at the Las Vegas airport.

Three senior Democratic lawmakers on Tuesday urged the Federal Aviation Administration to address significant safety issues at Reagan Washington National Airport and maintain reduced air traffic after a series of troubling incidents.