Libyan rebels have celebrated their advance into Tripoli by firing guns in the air. How hazardous is this? It is, unarguably, an emphatic way to display one's jubilation. Shooting an automatic weapon into the sky to signal an occasion one welcomes is a popular practice in much of the world, as the footage of Libyan anti-Gaddafi forces seizing the main square of the capital city has demonstrated. But it is a potentially fatal activity, which regularly results in the... (GunPolicy.org)