NATO warplanes intercepted a MiG-23 fighter jet operated by a Libyan rebel pilot yesterday and forced him to land after he violated a UN-mandated no-fly zone. According to a NATO official, the jet had taken off from a rebel-controlled airfield near the eastern city of Benghazi in the morning and was intercepted within minutes. No weapons were fired by either side and the NATO fighters proceeded to force it to land back at the Benina airfield, the official said. It was the first time that any aircraft violated the no-fly zone since NATO took command of the mission from a US-led coalition on March 31.