The Upper Atmosphere Research Satellite (UARS) is the largest American space agency satellite to return uncontrolled into the atmosphere in about 30 years.

BBC: Nasa's UARS satellite falls off west coast of US

Experts say they will get a more precise idea in the last 12 hours before the satellite is due to return.

BBC: Nasa refines satellite crash time

Yene says he gave Herman money -- in one instance, cash in an envelope -- in return for her influence, including helping someone secure an FCC license for a satellite telephone system.

CNN: Herman Focus Of Influence-Peddling Probe