The goal of the NASA Near Earth Object Program is to discover any objects on a collision course with planet Earth. We now know of more than 90% of objects whose impact could cause global climate change. None of them is a current threat. A more likely problem are the millions of small space rocks which come near to us. We are working on creating the ability to give a tornado like warning for people to stay away from doors and windows should one of them be about to enter our atmosphere.