Post-Katrina, you’ll notice that many places implemented laws against firearm confiscation, because of what happened. Mississippi being one of the most recent.
Other places, such as California and Connecticut, have gone the opposite way.

But federally, since passed by the President in 2006, Homeland Security Appropriations Act of 2007 HR5441 (109)


Section557 –
Amends the Robert T. Stafford Disaster Relief and Emergency Assistance Act (Stafford Act) to prohibit any U.S. officer or employee, or person operating under color of federal law, under control of a federal official, or providing services to such person, while acting in support of relief from a major disaster or emergency, from:
(1) seizing any firearm the possession of which is not prohibited under federal or state law, other than for forfeiture in compliance with federal law or as evidence in a criminal investigation;
(2) requiring registration of any firearm for which registration is not required by federal or state law;
(3) prohibiting possession of any firearm where such possession is not otherwise prohibited; or
(4) prohibiting the carrying of a firearm by any person otherwise authorized to carry firearms, solely because such person is operating under the control of a federal agency in support of relief from a major disaster or emergency.
Authorizes any individual aggrieved by a violation of this Act to seek relief by bringing an action for redress and by bringing a civil action in U.S. district court for return of a confiscated firearm.

As to the former military personnel being labeled as potential terrorists, I put that in the same category as Diane Feinstein, a potential prostitute. But then again, she’s been selling her vote and soul for years so she’s more likely the proven prostitute than any military retiree is a potential terrorist.