tell me why they say their doing it. >> reporter: this is a five minute video posted on the internet. it shows the mosul museum. you see men pushing one statue over after another, smashed to the floor and they go after them with sledge hammers. then you see another man with a drill defacing these famous winged that dates back to the 7th century b.c. during this video there's an unidentified man who claims they are destroying idol because that's what god has ordered them to do and they will do it even if they were worth billions of dollars. this is really part of this long term campaign by isis to eradicate any vestages of pre-islamic, non-islamic civilization. we've seen this happen in