cnn's brooke baldwin is on the coast watching it all unfold for us. dome? how does it work? >> reporter: wolf, think of this containment dome as a big, massive, metal, concrete funnel. and the best way i can sort of explain it is by demonstrating. imagine you have a funnel just like this, this funnel, this concrete dome, is being taken right now from what i'm hearing it's just now exiting port buchon in louisiana and entering the big waters here on the gulf. it will continue for about 50 miles offshore to the leak location, and then what will happen is they'll take a system of piping, so, like, a straw, for example. they'll put the piping inside of this containment dome and then with a ship up above, they'll be able to siphon or essentially suck up what may be 85% of this oil that's leaking. what's key here is that bp has never performed an operation at this depth of water, 5,000 feet under, but this is a first for them. so, keep in mind they did cap one well this morning, but, of course, that means the volume of the gush has not changed. it is still