house oversight committee. they've been reviewing some classified documents connected to the former national security adviser, michael flynn. this has to do with the investigation or investigations, at this point, into possible russian connections to the past elections. >> we're expecting to hear from the chair of the oversight committee, jason chaffetz, at any moment. meantime, while we wait for that, we take you overseas. a new brazen show of force overnight by north korea amid escalating tensions between the u.s. and north korea. overnight, north korea carrying out a very large-scale artillery drill as an american nuclear submarine arrives in south korean waters. that move by the u.s. now being described as a show of force. >> today, north korea's celebrating the 85th anniversary of the founding of its army, and it comes as president trump just said of the north korean leader kim jong-un "i'm not so sure he's so strong like he says he is." we want to get to international correspondent alexandra field, in seoul, south korea. big show of force overnight.