I'm not American so perhaps it is my ignorance of "the right to bear arms" that would make me question how an individual could build up an arsenal along the scale that James Holmes had? Also how he could order the level of ammunition online, all reportedly legally, which he did without triggering somewhere on a law enforcement level that he may be a risk?
My own opinions as to whether one should carry a firearm I accept are a whole different thread but I genuinely ask are there no limitations?
Regarding the previous posters comments questioning why someone didn't return fire? I honestly find this comment beyond belief