Protesters rally in Hong Kong on handover anniversary Protesters take to the streets of Hong Kong to mark the anniversary of the city's handover from Britain to China, with pro-independence groups rallying for the first time amid fears Beijing is tightening its grip. But a Hong Kong bookseller who was detained and interrogated for months in mainland China, and was due to lead the annual march, pulled out at the last minute citing a "serious threat" to his security. IMAGES AND SOUNDBITES