realized. >> yeah, it is pretty close to denver, actually, but going along i-76, which is one of the main highways out of denver toward, say, officer ling, colorado. so that's where it's -- you can see, yes -- hudson, northeast of the denver area. >> david, we have susan is and lester holt. you see the tether there, susan. and it appears, as you pointed out, helium may be leaving rapidly from this aircraft. give us some insight into what we are watching. >> again, it is hard to tell from this point of view, but it is clear that helium is leaving at a quicker rate. he will be descending more quickly and this is -- i don't know how much longer he will stay in the air but clearly, this thing is not going to be in the air for hours and hours.