The US Army is facing “administrative claims” by 83 victims and families of the Fort Hood massacre in 2009 seeking $750 million in compensation.  The filings assert

willful negligence enabled psychiatrist Maj. Nidal Hasan to carry out a terrorist attack at Fort Hood, Texas…
 
[They] said the government had clear warnings that Hasan, who is scheduled to go on trial in March, posed a grave danger to the lives of soldiers and civilians. 
 
The government bowed to political correctness and not only ignored the threat Hasan presented but actually promoted him to the rank of major five months before the massacre, according to the administrative claims against the Defense Department, the Justice Department and the FBI.

Attorney Neal Sher apparently represents the claimants; he

ran the Justice Department’s Office of Special Investigations that hunted Nazi criminals living illegally in the United States. He also is a former executive director of the American Israel Public Affairs Committee, a pro-Israel lobbying group.

A government report produced after the attack for Sens. Joe Lieberman and Susan Collins may help their cause, as it reported

an instructor and a colleague each referred to Hasan as a “ticking time bomb.”

Likewise, the US Army publicly stated it punished nine officers to varying degrees for their roles in Hasan’s criticized career advancement.  That the Army already found wrongdoing within its ranks may support claims of institutional culpability.