Impact - Describes the threat of a comet impact with Earth and provides a plan of action to survive a large impact. Meteor Defense - An argument for reducing global tension by developing a defense against impacts with Near Earth Objects. BBC News: Government Prepares for Space Impact - The UK government is to establish a panel of experts to advise on the risk of the Earth being hit by an asteroid or comet, and plans for evacuation and/or deflection. U.S. Summons Experts to Draft Asteroid Defense Plan - A Cincinnati Post news story about a meeting called by the U.S. government on the chances of an asteroid strike and a possible defense for it. China Daily: Dangerous Space Rocks Under Watch - Astronomers say they are well on their way to finding every asteroid that poses a threat. Impact Parameters - Online calculator for cratering effects of hypothetical asteroid impacts. The SpaceGuard Centre - National focus in the UK for studies into the threat posed to the Earth by collisions with asteroids and comets.