was written by Maj . Ali Hasan 's colleagues at Walter Reed . NPR says it has a copy of the memo ; CNN can not confirm authenticity . Memo says ` ` ' has serious concerns '' about Hasan 's work ' .
Memo written by Maj. Nidal Hasan 's supervisor at Walter Reed . NPR says it got a copy of the memo ; CNN can not confirm authenticity . Memo says `` faculty has serious concerns '' about Hasan 's work ethic .