Fallon just demolished Rowe, who then essentially used September 11th to defend the Secret Service failures regarding the assassination attempts on President Trump.
Moskowitz [Assassination attempt hearing]: We have to be serious about breaking up Homeland Security. We have to realize that a twenty-two agency department cannot function efficiently.
A presidential pardon applies to all federal charges, which includes the Uniform Code of Military Justice.
"The UCMJ is federal law, enacted by Congress which applies to all active duty members as well as activated National Guard and Reserve members and military academy students."
https://www.military.com/join-armed-forces/the-uniform-code-of-military-justice-ucmj.html
A presidential pardon does not cover state charges, so that would also be a solution if the crime was committed in a jurisdiction where a state's attorney is willing to prosecute.
That would be almost better than prosecuting them here; many of these people could be extradited to other countries and essentially thrown into a dungeon forever.