The US Supreme Court's decision striking down a 32-year ban on handguns in Washington, D.C., has sparked a string of lawsuits across the country challenging the constitutionality of various gun regulations. Two suits in Chicago seek to have that city's handgun ban declared unconstitutional. A ban on handgun possession by public housing residents in San Francisco is under attack. To avoid legal action, three Chicago suburbs have voted to repeal their gun bans, while a... (GunPolicy.org)