wing or tail of the plane were clipped during that second failed landing attempt or whether it nose dooid at high speed into the ground. the force of the impact caused the plane to break into small pieces, skalt erred across a large area. it is among this debris that russian investigators discovered the two black boxes intact. relatives and friends gathered at the airport and learned that all passengers and staff were killed. it has a strong safety record. the airline says its staff are in shock. >> we do not yet know all of the details of the incident, but we are working closely with the authorities to establish precisely what happened. we are making every effort to care for those affected and will provide assistance to the families and friends of those who were on board. >> reporter: russia's investigative committee says it is looking into two possibilities. terrorists have been ruled out >> translation: the investigation is looking into two main versions for the plane crash, a mistake by the pilot or a malfunction in the plane >> reporter: now that both the voice and data recorders are