of course, the area near moscone center because ofrefoe. all of this combining for a major problem in downtown san francisco. >> chris, i know it's early in the process of inspecting that beam and possibly other ones to be certain that everything is going to be okay there. but are they giving you any sense for how long this might take? does it look like they're hunkering down for hours or perhaps longer? >> that's a great question, kristen. i know in five minutes or so, the joint powers authority will be holding a press conference to greet the media on everything that's going on right now. again, i'm looking at first and mission. they've got mta out here. police officers are out here blocking off the streets. they've just put up a yellow caution tape to block off the areas, which is new in the past ten minutes or so. so for now, you know, major question looms as to how long it's going to take for the roads to reopen. >> chris, i understand you sweetswee tweeted out some video. can you talk us through that video? >> reporter: it was showing