Under the Iraqi Scientists Immigration Act of 2002, passed by the Senate on Wednesday, up to 500 scientists could be given green cards if they reveal critical information on weapons programmes.

The bill, which could be passed by the House of Representatives as early as Friday, applies to scientists, engineers and technicians.
...
Mr Biden thinks the bill will bolster the work of UN inspectors, investigating whether Iraq does have WMD.

"With this bill, the United States can help ensure that weapons inspectors and the United States have access to crucial information, by protecting the people who can provide it and by safeguarding their families," Mr Biden said.
...
In 1994, Khidhir Hamza, an American-trained senior Iraqi nuclear scientist, left Iraq having grown disenchanted with the regime there.

He eventually made it to America, where he revealed valuable details on Iraqi attempts to hide its weapons programmes.

» Green cards to lure Iraqi scientists