Do you think someone pushed this design on purpose? I would think not but they should certainly have ammended it when the similarities were pointed out.
http://michellemalkin.com/2005/09/10/flight-93-memorial-seeing-is-believing/
http://www.nytimes.com/2008/05/05/us/05memorial.html?ref=us
Crescent of Betrayal
http://www.crescentofbetrayal.com/