President Obama is "outraged" by North Korea's attack on a South Korean island, White House deputy press secretary Bill Burton said Tuesday. Obama plans to call South Korea's president, Lee Myung-bak, on Tuesday, Burton said, adding that Tom Donilon, his national security adviser, called Obama at 3:55 a.m. to tell him of the attack. "The president is outraged by this action," he told reporters on Air Force One. "We stand shoulder to shoulder with South Korea."