Extras

Video thumbnail: NOVA Bomb Squad Robots

NOVA

Bomb Squad Robots

Remote controlled robots keep police department technicians safe from potential bombs.

Bomb Squad Robots

Video thumbnail: NOVA Manhunt—Boston Bombers Preview

NOVA

Manhunt—Boston Bombers Preview

Follow the manhunt, step-by-step, for the suspects in the Boston Marathon bombings.

Manhunt—Boston Bombers Preview