A protester argues with a police officer during a demonstration in Hong Kong, China July 1, 2015, the day marking the 18th anniversary of Hong Kong's handover from Britain to Chinese sovereignty. Thousands of Hong Kong protesters marched for full democracy on Wednesday and called on the Chinese-controlled city's leader to resign, just weeks after lawmakers voted down an electoral reform package backed by Communist Party leaders in Beijing. REUTERS/Bobby Yip TPX IMAGES OF THE DAY