For secondary collapse. that secondary collapse would then result in potentially additional injuries or deaths of the rescuers. so, it really is sometimes, simultaneously, sometimes, you cannot get into an area until you actually do the shoring. but the shoring is really absolutely critical and essential. and that s what you see going on here now, they re really trying to build, restructure that building and build a stable way to get into where all of the kids are located. again, as we re having this conversation, watching these workers unload these beams that you re talking about, just scores of these beams. again, we ve been seeing the scene play out over the last few hours. it really is quite remarkable to watch. to watch them do this time and time again. mark, really quickly, we are again, approaching the 40th hour here. in your experience. how much time do we have? well, in reality, we are just ....