parents and children. three months after an 18-year-old killer gunned down two teachers at robb elementary school. no teachers or staff are returning to robb this more than. they re absorbed in other schools. at least 15 schools showing support by wearing uvalde s maroon colors. beefed up protection at several uvalde schools including fences and comfort dogs on hand and parents on hand as well. some say the district says has not been enough. cnn s shimon prokupecz is live. for now, shimon, parents and kids will take that walk or drive to school for the first time. reporter: and as you guys point out, certainly a different kind of anxiety and anticipation for the first day of school here in at uvalde. school delayed here for several weeks as the school district work to implement new security measures. you can see this fence behind me. this was not here from the massacre at robb elementary. it s something new that the school put in place to give a feeling of safety to the
even right now. so this is causing concerns. when you say hanging on by its fingernails, that seems to imply it s at some possible tipping point. what does that mean? right, the glacier is actually kind of a lengthy portion of the glacier that sits on the sea core. it s hanging on to the edge of the seabed. and that part of the glacier is actually losing contact and right now, we re concerned for the future because when it does come off that seabed ridge, from the sea core, then it loses a bit of its kind of strength. that s what s kind of holding some of the ice that s behind it from flowing out into the ocean. so when that happens when we look at more theory, and that is the ultimate and destination where the ice is going. it can literally lose its grip on the seafloor that in