part over radiation concerns. now there is an internet campaign urging passengers to refuse screenings the day before thanksgiving, one of the busiest travel days of the year. as tyner left the airport, he says security officials chased him down and told him he had to complete screening once he'd started it. he says he walked off anyway after being threatened with legal action. the focus will be on air cargo security today on capitol hill. the head of the tsa is expected to testify on the new actions being taken to improve security in light of that parcel bomb plot. british police discovered an industrial explosive packed into printer cartridges sent from yemen, destined for addresses here in the u.s. we are learning this morning that the qantas mid-air engine blowout earlier this month could have been a lot more serious than first believed. leaking oil caught fire in the engine and heated metal parts. those parts disintegrated and the flying metal cut important lines, causing the pilots to lose control of the jet's wing. it's believed that if the incident happened later into the