I am not sure how much national attention this story has gotten but there was a tragedy that took place in Bostons Big Dig on July 10th. One of the ceiling panels that are hung in the tunnels of the biggest construction project in the world, the Big Dig, fell and crushed a car killing a woman inside. The panels are 20 x 20 and reports have said they weigh anywhere from 3 to 12 tons https://thevapor.kr/