What's 420? By common consent, it's code for marijuana use. Which makes April 20, an unofficial stoner's holiday. Note that we said unofficial. On 4/20, at 4:20 p.m., look for stealth smokers.

Berlin police say some 4,000 people gathered at the German capital's landmark Brandenburg Gate on Saturday for a "Smoke-In" celebrating the recent legalization of cannabis in the country. The day ...