Advocates of stricter gun legislation hold a candlelight vigil for victims of recent mass shootings outside the headquarters of the National Rifle Association on Monday in Fairfax, Va.

Advocates of stricter gun legislation hold a candlelight vigil for victims of recent mass shootings outside the headquarters of the National Rifle Association on Monday in Fairfax, Va.

Advocates of stricter gun legislation hold a candlelight vigil for victims of recent mass shootings outside the headquarters of the National Rifle Association on Monday in Fairfax, Va.

Advocates of stricter gun legislation hold a candlelight vigil for victims of recent mass shootings outside the headquarters of the National Rifle Association on Monday in Fairfax, Va.