Sen. Charles Schumer is calling for a probe of security safeguards at nuclear plants following revelations that
a suspected al-Qaida operative worked at six U.S. atomic facilities.
Sharif Mobley is now in custody in Yemen following a shootout at a hospital there.
The 26-year-old is a U.S. citizen and officials say he passed all necessary background checks when he worked as a contract laborer at plants in New Jersey, Pennsylvania and Maryland.
Schumer says he wants the Nuclear Regulatory Commission's Inspector General to look into the reliability of background checks conducted on plant workers.
He says the episode suggests checks may need to be more thorough.