aide, presidential seal. 助手, 總統徽章

An aide hangs a presidential seal on the wall before U.S. President Barack Obama arrives to sign the Every Student Succeeds Act into law in the Eisenhower Executive Office Building at the White House in Washington, December 10, 2015. (REUTERS/Jonathan Ernst)
Photos of the day - December 10, 2015
http://news.yahoo.com/photos/photos-of-the-day-december-10-2015-1449763298-slideshow/photos-of-the-day-december-10-2015-photo-1449769302760.html