The CuatroTorres residential building complex is demolished during a controlled implosion, in the city of Medellin

The CuatroTorres residential building complex is demolished during a controlled implosion, in the city of Medellin

The CuatroTorres residential building complex is demolished during a controlled implosion, in the city of Medellin September 23, 2014. Colombian authorities imploded the Medellin apartment building that partially collapsed almost a year ago, killing 11 people. REUTERS/Fredy Builes (COLOMBIA – Tags: DISASTER SOCIETY TPX IMAGES OF THE DAY)