morning. if they feel the threat is strong enough, what they will do, alex, they will maneuver the space station tonight, slow it down slightly so it doesn't get hit and hopefully that will take care of that threat. alex? >> hey, jay, how close can something come before it's considered a threat? i mean, how much space does there have to be between space junk and the international space station? >> you know, i think they wanted several thousand feet out there. i know if i was up there, i sure would. >> yeah. >> because i don't want it to get close and say, well, it's going to miss you by ten feet, forget it. i want it out there and i want to be away from it. >> let's not be anything but overly cautious. thank you, jay, we'll talk to you again. a 16-year-old australia girl is the first one to circle the global unassisted. jessica watson spent months at sea and thousands of spectators were in sydney harbor to welcome her home. >> i'm completely overwhelmed.