so when i first heard this, i thought, you know this is the same movie being played a third time. but, of course, we don't know. it's important to emphasize we do not know. but we're going to know soon. they'll be able to send monitors out soon and find out if it is breeched. if imt is, that's bad news. >> what does the containment vessel do? and when you say breeched, you mean busted open and explain to the folks listening, if that happens then what are we worried about? >> yeah. i want to give cnn a shoutout to a cnn viewer who e-mailed me today. and suggested that i use this metaphor. she said it's like the russian doll that's fit inside one another. the wooden dolls. so the outside doll is the building that contains the reactor. and then within that, there is a containment vessel. that is five, six more feet of