Police led a team into Hong Kong Polytechnic University early Thursday to sweep the besieged campus, where about 20 anti-government protesters are believed to still be hiding out after almost two weeks.Although some 1,100 protesters who were on the campus when a daylong clash with police took place on Nov. 17 have since then surrendered, those staying behind have vowed not to do so.About 400 police officers, including crime investigators, a bomb squad and mediators, entered the locked-down campus along with firemen and psychiatrists in the early morning, but encountered no protesters.The po…READ FULL ARTICLE