U.S. Sen. <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Elizabeth+Warren&family=editorial&specificpeople=5396017 ng-click='$event.stopPropagation()'>Elizabeth Warren</a> (D-MA) (L) listens to Sen. <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Barbara+Mikulski&family=editorial&specificpeople=226768 ng-click='$event.stopPropagation()'>Barbara Mikulski</a> (D-MD) (R) during a hearing before Senate Health, Education, Labor and Pensions Committee February 10, 2015 on Capitol Hill in Washington, DC. The committee held a hearing on 'The Reemergence of Vaccine-Preventable Diseases: Exploring the Public Health Successes and Challenges.'
{"Image ImageDescription": "WASHINGTON, DC - FEBRUARY 10:  U.S. Sen. Elizabeth Warren (D-MA) (L) listens to Sen. Barbara Mikulski (D-MD) (R) during a hearing before Senate Health, Education, Labor and Pensions Committee February 10, 2015 on Capitol Hill in Washington, DC. The committee held a hearing on \"The Reemergence of Vaccine-Preventable Diseases: Exploring the Public Health Successes and Challenges.\"  (Photo by Alex Wong/Getty Images)", "Image Copyright": "2015 Getty Images"}