I don't recall if anyone has every mentioned this before, but with the 6th anniversary of the destruction of the World Trade Center towers on 9/11/2001 being on the news lately, it's interesting to note that Rev. 9:11 contains a verse about the destroying angel called Abaddon which is Greek word #3 in Strong's Concordance.  'Abad, which is Hebrew word #7 in Strong's Concordance, means to destroy, perish, and Hebrew word #11 'Abaddown means perishing, destruction.  Doesn't it seem odd that the destruction on 9/11, and verse 9:11 in Revelation have a similiar subject of destruction?