the money they invested. >> it's interesting. it's neutrally buoyant and designed to have equal pressure on both sides of the envelope. to shoot it down is no small task. you would have to unleash quite a few 20 millimeter rounds to do it. clearly, it was losing helium and designed to stay up there for 30 days and came down quickly. was it a result of the accident or something along the way that caused the helium to expel. >> this is the first time ever a blimp like this has ever gone unteethered and starting floating away. do they have a sense how this happened. >> it was fairly windy. la lousy weather, makes you wonder why they didn't have a second or third tether. redundancy would have been good. >> it could have been different if it crash landed. >> if you went up the northeast,