Someone who believes that the Bush administration was somehow responsible for 9/11. Either through having advanced information and doing nothing about it or staging the whole thing to begin with. AKA: raving wackjobs.
BTW, one of the prominent Birther attorneys, Leo Donofrio, is also a hard core Truther.
Help me out...What's a truther?
Well, a "Truther" is someone who says that Bush and/or our government had a hand in the attacks on 9/11. They're basically saying that Bush and the government "set it up" so that they could go to war against the Muslims and over in the Middle East and to enact freedom-busting laws against the citizens of this country...
That would also include "Phil Berg" who the Obama Derangement Syndrome people (on Free Republic) have also supported... :-)
A truther believes that the government was behind 911.
"..9/11 Truth movement is the collective name of loosely affiliated organizations and individuals who question the mainstream account of the September 11, 2001 attacks. Adherents of the movement discuss different hypotheses about how the attacks happened and call for a new investigation into the attacks.