Two men with ties to the U.S. military are accused of perpetrating terrorist attacks on New Year’s, bolstering concerns over the capacity of military members who have been radicalized to use their training and knowledge for domestic harm.

Shamsud-Din Jabbar, 42, and Matthew Alan Livelsberger, 37, who police say are behind the New Orleans Bourbon Street attack and a Tesla Cybertruck bombing outside of a Trump hotel, respectively, both served in the Army.