Morandini Bridge colapsed in Gênes, Italy : it may have been intentionaly destroyed by controled demolition.

http://www.wikistrike.com/2018/08/genes-le-pont-morandi-a-t-il-ete-volontairement-dynamite.html

Do you remember the numerous exchanges between Pope, Hussein and others with the word "concrete" ? Could it be related ?

Sorry the link is in french.