japan. lisa's back with that, some of the other top stories in the situation room. what are we learning? >> wolf, japan's nhk reports that the leak of highly radioactive water from the daiichi nuclear plant into the pacific ocean has been plugged. the plant's operator says a substance dubbed "liquid glass" was used to seal the crack in a collection pit. tests show the water had radiation levels more than seven million times higher than the legal limit. there's also a new worry after radiation was found in a sample of fresh fish. sources tell cnn that president obama has picked debbie wasserman shultz to be the next chair of the democratic national committee. the florida representative got the nod for her strength as a fundraiser and her standing in her home state. she will replace tim kaine, who is accepting down to run for virginia's open senate seat. the supreme court is putting the brakes on the execution of convicted murderer cleve foster. it says it needs more time to rule on his claims of innocence