WASHINGTON, June 5 (Reuters) - A group of seven

Democratic senators on Thursday introduced sweeping air safety

legislation after a fatal collision between an Army helicopter

and an American Airlines ( AAL ) regional jet in January near

Reagan Washington National Airport killed 67 people.

Lawmakers have questioned why the Federal Aviation

Administration failed to act for years to address close calls

involving helicopters near Reagan. The legislation would require

a review of helicopter and passenger operations at major

airports, mandate new FAA safety reviews after fatal passenger

airline accidents and require the use of use ADS-B, an advanced

aircraft-tracking technology.