Why expose innocent doctors, nurses, and hospital personnel, as well as police guards to that exposure. Besides, at Gitmo, more appropriate questioning may be still available.
Well, being refugees from war torn Chechnya, our government put them on welfare from the moment they entered the country. Being Muslim, our government, and local Muslim outreach programs, afforded them grants, scholarships and stipends in order to continue their higher education.
Their guns could have been procured from various sources; but, rest assured, it is harder for a law abiding citizen (whatever that word implies anymore) to legally purchase and own a firearm than it is for a sleeper cell Muslim.
It has been proffered that the older brother received his training abroad with the full knowledge and acquiescence of out government (FBI, Homeland Security, ICE, etc.)
Their direction came from the Koran and the encouragement of their Imams.
How do we know that? I haven't seen anything they did that I couldn't figure out in an afternoon on the Web.