(CNN) - NASA is looking for asteroids big enough to destroy an entire city, and it wants your help finding them.
According to the Washington Post, the White House and NASA discussed the potential threat Tuesday. They said there are more than 25,000 asteroids in orbit that are at least 328 feet in diameter. Rocks that size could kill multiple people if they struck the Earth and we don't know where 75 percent of them are.
NASA wants Congress to give it $40 million to find the asteroids. It's also expected to solicit astronomers, scholars and the international community for help.