Ed Nowicki (head of the International Law Enforcement Educators and Trainers Association) and I explain why in an op-ed in today's Baltimore Sun. The Nowicki-Kopel amicus brief is here.
I'm sure the military would also find that a recruiting pool familiar with the use of rocket launchers would be most beneficial.
In the Spanish American War who were the volunteers most regarded for their capability with arms. The rich East Coast men who hunted for sport and the western cowboy types.