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oh you're no fun. [lock clicks shut] all five passengers on the missing titanic sub are suddenly dead, starting now, the titanic wreckage area, the site of yet another tragedy after debris believed to be from the missing submersible is found with the passengers feared dead and wreckage on the ocean floor. rescue operations now shift from rescue to recovery. safety concerns flagged well before the operation, one contractor that worked with oceangate says there was an experimental decision during construction of the vessel, and in the wake of this tragedy, cnn is going to examine d...

Eric: president trump has made the bo, as you know, a cornerstone of his campaign. now as the government is about to start testing prototypes you see there, the president says controlling the southern border will be a significant step in the war on drugs. >> an astonishing 90% of the heroin in america comes from south of the border where we will be building a wall which will greatly help in this problem. [applause] it will have a great impact. eric: meanwhile, the arrests of illegal immigrants by border agents is reportedly way up in recent months. immigration and custom enforcement is looking...

taxpayer dollars wasted. i'm wolf blitzer. you're in "the situation room." -- captions by vitac -- www.vitac.com the obama administration replies to a rare order from a federal appeals court. the latest round of a sharp dispute over the nation's health care reform law. we begin with president obama warning the supreme court against overturning his cherished legislation. judges hearing a separate case took offense at what the president of the united states said and they demanded a three-page written explanation. let's go straight to our congressional correspondent kate bolduan. she'...