Evidence was briefly presented at the hearing, including a pen with a camera in it and a watch, which the prosecution alleges were used in passing illicit information.

BBC: Lawyers appointed for Saif al-Islam Gaddafi

If needed, staff in a control centre can see and hear everything the field engineer is seeing and hearing via the camera and microphone mounted on the robot arm.

BBC: IBM's robot sidekick aims to aid field engineers

The hearing provided Republicans with a final opportunity to question Clinton, considered a possible presidential contender in 2016, on camera before she leaves office.

CNN: STORY HIGHLIGHTS