finding them again is crucial to narrowing the search area so a small danijl subasic can look for -- submarine can look for debris on the sea floor. >> i believe we are searching in the right area, but we need to visually locate aircraft wreckage before we can confirm with certainty that this is the final resting place of mh370. >> for the sake of the 239 families, this is absolutely imperative. >> the locator beacons on the black boxes have a battery life of about a month. tuesday marked a month since the plane vanished. searchers say once the baekons were located, it would have been knock. >> a new diplomatic push to ease tensions in ukraine. secretary of state john kerry is expected to meet with officials from russia, ukraine and the e.u. meanwhile in eastern ukraine the standoff continues. pro-russian protesters seized government buildings in three cities. ukraine says dozens are held hostage. we have this report from the city of donetsk. >> three days since seizing the government administration building, pro-russian protesters are enforcing barricades. with negotiations between