Chinese President Hu Jintao’s three-day visit to Hong Kong has been met with violent street protests.<br /><br />A reporter was detained for asking a question about Tiananmen Square, the 1989 military crackdown on pro-democracy protesters that left hundreds dead.<br /><br />Hu has been meeting delegates on the eve of the 15th anniversary of Hong Kong's return to China.<br /><br />Al Jazeera’s Rob McBride reports from Hong Kong.