momentarily. stand by for that. also breaking right now, we re learning more about a brutal new tactic russia is using in ukraine, dropping land mines from the sky that detonate on on their own hours later that potentially can kill a lot of people. our chief investigative correspondent has this report. reporter: this is the central market in charm i have and this is the site of most of last night s strikes. we ve come here with emergency first responders because russians have come up with new tactics to make sure that the devastation of their attacks last far beyond first impact. the lieutenant colonel is the head of the disposal team i m we have to detonate these remotely to avoid damage to the civilian population.