WASHINGTON (AP) _ Hoping to thwart terrorist attacks, two senators want to require people to obtain permits before they can get explosives.

``Most Americans would be stunned to learn that in some states, it is easier to get enough explosives to take down a house than it is to buy a gun, get a drivers' license, or even obtain a fishing license,'' said Sen. Herb Kohl, D-Wis.

He introduced the Safe Explosives Act with Sen. Orrin Hatch, R-Utah, on Thursday.

The bill would cover all purchases of explosives. Current law requires permits only for interstate purchases of explosives.

Background checks would be required for people who want to buy explosives. Convicted felons already are barred from purchasing explosives, but the bill would extend that prohibition to nonimmigrant aliens.