dan scheneman, better idea of how much of this building collapsed. take a look at this. that entire section in red, we also have that before and after look and the entire section in the northeast corridor next to the pool is really just no longer standing. >>> the big question many people are asking, how did this happen? that building near miami has been sinking for years. is that the problem? or part of it anyway. we spoke with an engineer. here is "today in the bay's" jean elle. >> reporter: while rescue crews searched the rubble for survivors investigators looking for answers about why the building collapsed will be searching the same debris. the american society of civil engineers says there are clues in the pile. >> the way it's piled up, the way that trained eye about how the failure initiated, where it might have initiated. >> reporter: there are many other factors for investigators to look into. built in 1981, the champlain tower was due for a required 40-year inspection. ongoing roof work and building movement will be considered. according to a recent report fro

for the latest on the search efforts, here's dan scheneman. >> reporter: at the scene of last eek's building collapse, the painstaking search goes on >> as we come across a crevice, as we come across a small void, we continue to focus and continue moving, continue digging through deeper to see if we find anything further >> reporter: crews working 12-hour shifts battling mother nature and shifting rubble >> if the rubble shifts we stop because you can't take a chance of the rubble shifting and harming somebody's life below. >> reporter: while the search continues, so does the wait and the worry. >> i wish i hugged her harder. >> reporter: near the scene a memorial is growing. condolences, flowers, and photos of the missing a community clinging to hope and already dealing with grief dan scheneman, nbc news. >> president biden is hitting the road today to sell the bipartisan infrastructure deal to the american people he's heading to wisconsin to tout the benefits of the $1.2 trillion plan nbc's tracie potts joins us now with the latest. tracie, if this passes, it would be the largest transport

dan scheneman, nbc news. >>> meanwhile, the community of surfside is collectively holding their breath hoping that their loved ones will be found >> reporter: this is the place where families are coming looked for their loved ones desperate for any information. we met a woman named erica whose friend was inside the building when it collapsed. >> i'm still in shock. my mother's telling me don't give up hope, but whom i kidding? do you think i'm going to see somebody crawl out of there? it would be an absolute miracle, but i think i have to come to terms that he's passed >> reporter: while you can feel the pain and the anguish of so many here, we have also seen a community coming together, neighbors bringing food and water to help each other go through what is certain to be a long night >> and days to come, julio, thank you. >>> former minneapolis police officer derek chauvin will be sentenced for the murder of george floyd today on april 20th, chauvin was found guilty of second-degree unintentional murder, third-degree murder, and second-degree manslaughter under minnesota statutes, cha