[tweet https://twitter.com/tim_cook/status/567822969596076032 align=’center’]

Georgia Congressman John Lewis took a tour of Apple’s headquarters with CEO Tim Cook today. Lewis is in town to promote his new graphic novel focusing on the civil rights movement, March: Book Two. Cook tweeted the photo with Lewis above earlier tonight.

Lewis also addressed Apple employees during an event held on campus today. Last year Apple revealed its diversity statistics for the first time in company history and promised to continue working on diversifying its workforce. Cook also met with Rev. Jesse Jackson in December to discuss the topic.

Alabama native Tim Cook has often discussed the civil rights movement and taken an active role in promoting policies and legislation related to various civil issues, including education as a right and race relations.