Ahead on face the nation. Good morning, welcome to face the nation im John Dickerson. Weve got lot of political news to get to but we start with an update on what caused a Russian Airliner bound for st. Petersburg from egypt carrying more than 200 passengers to crash in the Sinai Peninsula early saturday. Cbs news correspondent allan pizzj in cairo, do authorities have any idea what caused the crash . The short answer to that is, no. Speculation centered on mechanical and technical problem, the copilots daughter has said that her father told her even before the plane took off that the pilots were concerned there was a problem. The plane took off in early hours of the morning, when it reached 31,000 feet and 400 noters the pilot called air Traffic Controllers said he had a technical problem and wanted to make an Emergency Landing then flight traffic shows that the plane dropped about 3,000 feet to 28,000 and slowed from 400 to 93 knots then all contact was lost. Now, immediately followi