Pro-democracy protestersput their hands up in the air in fron of the police in Hong Kong on September 28, 2014. Police fired tear gas as tens of thousands of pro-democracy demonstrators brought parts of central Hong Kong to a standstill on September 28, in a dramatic escalation of protests that have gripped the semi-autonomous Chinese city for days. It marked a dramatic escalation of protests in the city, which rarely sees such violence, after a tense week of largely contained student-led demonstrations exploded into mass angry street protests. AFP PHOTO / ALEX OGLE (Photo credit should read Alex Ogle/AFP/Getty Images)