President Obama is considering and planning for potential airdrops of food and water to thousands of Iraqi refugees stranded on a mountain top in Northwest Iraq — and airstrikes against the militants who have trapped them there, U.S. officials told NBC News. A offensive by Islamist militants forced the refugees to flee their homes, and thousands, mostly women and children, are isolated atop Mount Sinjar, near Mosul. Attempts by the Iraqi military to airdrop air supplies failed to provide sufficient relief.