US President Barack Obama (R) speaks with Israeli Prime Minister Benjamin Netanyahu during a meeting in the Oval Office of the White House in Washington, DC, May 18, 2009. The White House meeting marks Obama's most testing diplomatic challenge yet after he made clear that he will vigorously push for a peace deal based on a Palestinian state and will seek to defuse Iran's nuclear drive with diplomacy. AFP PHOTO/Jim WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)