The world's biggest helicopter was used to drop stones to prevent the dam break in central China.<br /><br />The video, shot in Yangxin County in Hubei Province on July 16, shows 27,000,000-square-metre farmland being submerged by floodwater after an over 50-metre-wide gap broke open on the dam.<br /><br />Three helicopters were seen hanging a bag of stones to drop them into the floodwater, while excavators piled up the mud to prevent the dam break and flooding.<br /><br />The gap on the dam has since been blocked successfully, reports said.<br /><br />The video was provided by local media with permission.
