::Since the above links are posted, for the sake of balance, here are Jim Hoffman's refutations: 

 ::* The Pentagon No-757-Crash Theory: Booby Trap for 9/11 Skeptics 
 ::http://911research.wtc7.net/essays/pentagontrap.html 
 ::* ERROR: 'The Pentagon Attack Left Only a Small Impact Hole'  
 ::http://911review.com/errors/pentagon/smallhole.html 
 ::* Another* Cowardly Attack by "Victor Thorn" 
 ::http://911review.com/wingtv/markup/hoffman.html 
 ::* Personal Attacks Against Jim Hoffman 
 ::http://911research.wtc7.net/re911/adhominem.html