>> welcome back to "fox and friends first," 3 us diplomats detained near the site of a nuclear explosion in russia. the state department says they were taken off the train on official travel. russia media reports the diplomats were released, 5 scientists were killed in an explosion in russia. us officials believe they were testing a nuclear powered missile. rescue effort underway, a newly surfaced video could provide clues to what went wrong. a thin beam bending between concrete floors two days before the collapse.