Ex-advisers warn against threatening to attack Iran

"Don't talk about 'do we bomb them now or later?' " said Brent Scowcroft, adviser to presidents Gerald R. Ford and George H.W. Bush, during a discussion at the Center for Strategic and International Studies on the negotiations between the United States and Iran.

Scowcroft added that by mentioning that threat, "we legitimize the use of force . . . and may tempt the Israelis" to carry out such a mission. He said he thinks that negotiations must continue and that sanctions have had an effect on Tehran, noting that even with elevated oil prices, Iran, alone among oil producers, is having a difficult time economically.