a department of transportation official. here's that voice mail. >> calling to share with you some information about the fiu pedestrian bridge and some cracking that's been observed on the north end of the stand, pylon end of that span we moved this weekend. so we've taken a look at it, and obviously some repairs or whatever will have to be done, but from a safety perspective, we don't see that there's any issue there. >> so a lot of discussion about the crack in the bridge, which seems to have been known to just about everybody, but the ntsb at this point is saying it is still too early to blame the collapse on that crack, julie. julie: how long, steve, before they know who is responsible? >> the ntsb says it is going to take at least one week to wrap up its investigation on site, and further investigation is going to continue on. you can hear those heavy jackhammers behind me. this is a slow process for a couple of reasons. first, there's 2 million pounds