Confirmation Hearing Held For FDA Commissioner Nominee Robert Califf

WASHINGTON, DC - NOVEMBER 17: Dr. Robert Califf awaits the start of his nomination hearing before the Senate Health, Education, Labor and Pensions Committee November 17, 2015 in Washington, DC. Califf is U.S. President Barack Obama's nominee to be the next commissioner of the Food and Drug Administration. (Photo by Win McNamee/Getty Images)