The Legal Action Center's website is a good resource, and the federal government has a site loaded with information about the Americans with Disabilities Act.

FORBES

The assault weapons ban was a complicated law and even firearms like the .223 Bushmaster believed used by the gunman Friday, wouldn't necessarily have been illegal under that law, said Jonathan Lowy, director of the legal action project at the Brady Center to Prevent Handgun Violence.

WSJ: In Reaction to Newtown, Connecticut, School Shooting Lawmakers Weigh In on Gun Control