Chernobyl Sarcophagus Cracking Up?

Twenty four years after a reactor exploded at the Chernobyl nuclear power plant in Ukraine, the nightmare is far from over.  As another anniversary ticks by, attention for a moment turned to the former power plant and the threat it still poses.  In particular, the huge concrete sarcophagus that entombed the destroyed the reactor.  The concrete was plastered together pell mell after the accident and the work was roughshod.  Not surprisingly, the concrete tomb hasn't held up well, and needs to be replaced, or else it could all come crumbling down, unleashing radiation still trapped inside.