TOPSHOTS The shadow of a student is cast on the ground as he holds a brush during the re-painting of a message of commemoration on China's 1989 Tiananmen Square crackdown, on the campus of Hong Kong University (HKU) in Hong Kong on June 4, 2015. Tens of thousands were expected later in the day to mark the 26th anniversary of the Tiananmen Square crackdown, organisers said, as they called on people to "stay united" as the city faces frustrations over its own democratic reforms. AFP PHOTO / Philippe Lopez