WASHINGTON, Feb 28 (Reuters) - More than two dozen

flights headed to Ronald Reagan Washington National Airport were

impacted on Friday by recent rules barring flights during

presidential helicopter trips, flight tracking site

Flightradar24 said.

After a January 29 collision between an Army helicopter and

an American Airlines ( AAL ) regional jet killed 67 people, the

Federal Aviation Administration adopted new rules effectively

barring flights to the busy airport just outside the nation's

capital when the Marine One helicopter is transporting the

president. Flightradar24 said 10 flights on Friday night were

diverted to other airports and more than a dozen others were

held during a 38-minute period without arrival flights.