NEW : Bush says Iran remains ` ` a threat to national security '' Comments come days after high - seas encounter between two , Iranian boats . National security adviser : `` We have made it very clear , and they know our position , and that is : There will be serious consequences if they attack our ships , pure and simple . '' Iranians ` ` are fishing in troubled waters here '' YouTube video shows Iranian boats racing back and forth near U.S. Navy convoy .
NEW : Bush says Iran remains ` ` a threat to national security '' Comments come days after high - seas encounter between two , Iranian boats . National security adviser : Iranians ` ` are fishing in troubled waters here '' YouTube video shows Iranian boats racing back and forth near U.S. Navy convoy .