The House of Representatives just passed bill H.R. 6063, directing NASA to come up with plans for a cheap mission to send a craft to the Apophis asteroid to attach a tracking device. Apophis is on route to come closer to Earth than geostational satellites in 2029, and if it smacked into the planet we'd be a little bit screwed.
In addition to paying close attention to Apophis, the bill requires the Director of the White House's Office of Science and Technology Policy to come up with a policy for notifying Federal agencies and other emergency response groups of an impending near-Earth object threat. Hopefully they'll come up with better plans than whatever it is they have enacted for natural disasters now, because their track record doesn't really inspire confidence. [KurzweilAI]