sending a security team to cairo to help with check-ins there. all checked bags have to go on a separate flight. they hope to change that and get the bags on the flight, but they don't believe egyptian officials can carry that out. they are sending their team along with bomb-sniffing dogs to the airport to help them out. in the meantime, egyptian officials are reluctant to say what caused the crash. they are saying it could be an engine exploding or a battery exploding. the bang in the final moments of the flight. they are urging patience. >> ian lee, thank you. this morning, a huge doping scandal rocking the sports world. according to the report, the russians are engaged in a state sponsored doping program.