WASHINGTON - MARCH 05:  Zbigniew Brzezinski, former national security adviser to President Carter and Gen. Brent Scowcroft (L), former national security adviser participate in the Senate Foreign Relations Committee hearing on Capitol Hill on March 5, 2009 in Washington, DC.  The SFRC committee, chaired by Sen. John Kerry (D-MA), is hearing testimony on the United States' strategy in dealing with Iran and reports on their nuclear program.  (Photo by Mark Wilson/Getty Images)