. -- flew between the erath and arth and moon. that had the same destructive power as the asteroid that destroyed hundreds of miles of siberia about 100 years ago. yet we did not discover it until sunday. those are huge challenges that we need to take up. we're not going to have space- based assets unless we clear the debris. and will not have a safe plant unless we can deflect -- detect, and deflect these types of challenges. -- we will not have a safe planet unless we can detect, and deflect these types of challenges. above the 45 seconds to comment. -- you have got 45 seconds to comment on my pontificate and. >> -- pontification. >> space debris is a crucial issue. the commercial industry is facing all sorts of problems with monitoring that. much of what we monitor is larger than some of the particles that could actually cause the real damage in space. that is a real problem that needs to be addressed. there are some people out there in the private sector that have some interesting ideas about how we could do that. >> as our co