A logo sign outside of the headquarters of the American Federation of Teachers (AFT) in Washington, D.C. on July 12, 2015.

- Image ID: EXFYXP
A logo sign outside of the headquarters of the American Federation of Teachers (AFT) in Washington, D.C. on July 12, 2015.
Kristoffer Tripplaar / Alamy Stock Photo
Image ID: EXFYXP