purpose: For example, concealed weapons prohibitions have been upheld under the Amendment or state analogues. The Court's opinion should not be taken to cast doubt on longstanding prohibitions on the possession of firearms by felons and the mentally ill, or laws forbidding the carrying of firearms in sensitive places such as schools and government buildings, or laws imposing conditions and qualifications on the commercial sale of arms. Millers holding that the sorts of weapons protected are those "in common use at the time" finds support in the historical tradition of prohibiting the carrying of dangerous and unusual weapons. pp. 54–56. 3. The handgun ban and the trigger-lock requirement (as applied to self-defense) violate the Second Amendment. The District's total ban on handgun possession in the home amounts to a prohibition on an entire class of "arms" that Americans overwhelmingly choose for the lawful purpose of self-defense. Under any of the standards of scrutiny the Court has applied to enumerated constitutional rights, this prohibitionin the place where the importance of the lawful defense of self, family, and property is most acutewould fail constitutional muster. Similarly, the requirement that any lawful firearm in the home be disassembled or bound by a trigger lock makes it impossible for citizens to use arms for the core lawful purpose of self-defense and is hence unconstitutional. Because Heller conceded at oral argument that the D. C. licensing law is permissible if it is not enforced arbitrarily and capriciously, the Court assumes that a license will satisfy his prayer for relief and does not address the licensing requirement. Assuming he is not disqualified from exercising Second Amendment rights, the District must permit Heller to register his handgun and must issue him a license to carry it in the home. pp. 56–64. The Heller court also stated (Heller, 554 U.S. 570 (2008), at 632) its analysis should not be read to suggest “the invalidity of laws regulating the storage of firearms to prevent accidents.” The Supreme Court also defined the term arms used in the Second Amendment. "Arms" covered by the Second Amendment were defined in District of Columbia v. Heller to include "any thing that a man wears for his defence, or takes into his hands, or useth in wrath to cast at or strike another". 554 U. S., at 581."<ref>[[Caetano v. Massachusetts|Caetano v. Massachusetts, 577 U.S. ___ (2016)]], slip op. at 6–7 (Alito, J., concurring in