Mark Regev, a spokesman for Netanyahu, said that the red line refers to "90 percent upon the path to weapons grade enrichment." Amos Harel, a military commentator for the liberal Haaretz who also noted the confusion among commentators, wrote that it refers to the amount of 20 percent enriched material required to begin high level enrichment.
"It's not clear if he’s saying that Iran can’t have a certain amount of medium-enriched uranium, or he doesn’t want Iran to have 90 percent enrichment grade fuel," says Barbara Slavin, a senior fellow at the Atlantic Council. "Where he drew the line was the wrong place. You want to stop them at 20 percent. You don’t want to let them get to weapons grade."
Dramatic flair
Netanyahu has used stage props to dramatize before. In an address to the American Israel Public Affairs Committee, he pulled out images of letters to the White House calling for attacks against Nazi Germany to stop the extermination of European Jews during World War II to assert a similarity between that period in history and his efforts to stop Iran.
He also gave President Obama a copy of the Jewish text the Book of Esther, which chronicles a thwarted effort to wipe out Persia's Jewish population a couple millennia ago, during a visit in March. His aides said it was meant as "background reading" on Iran.
