美国迈阿密一栋高层住宅楼倒塌，造成多人死亡，百多人失踪.世界各国都有不少的高楼，为什么偏偏美国接二连三的塌楼，断桥，溃坝呢？是不是因为落后的民主制度造成效率低下，各方扯皮，责任不清晰导致工程质量得不到保证？这引发人们的深思。 6park.com
https://www.nbcnews.com/news/us-news/rescuers-rush-partial-building-collapse-miami-beach-n1272216 6park.com
https://www.nytimes.com/live/2021/06/24/us/miami-building-collapse 6park.com
https://www.foxnews.com/us/washington-dc-pedestrian-bridge-collapse 6park.com
https://www.cnn.com/2021/06/23/us/pedestrian-bridge-collapse-washington-dc/index.html