Ex-Astronaut Says NASA Asteroid Report Flawed

Schweickart reported that by 2019 asteroid watchers will have on the books upwards of 10,000 objects with a non-zero probability of impacting Earth. "The bottom line," he said, "is that in the next 10 to 12 years, we are going to, in all likelihood, have to make decisions...not because one of these things is going to hit us...but because several of them look as though they might hit us."

"We're going to have to act in a timely way," Schweickart said. "What is changing dramatically in the next decade is our knowledge of the NEO environment. You have to take action based on your knowledge...your best understanding of the truth."

http://www.space.com/adastra/070527_isdc_asteroids.html