International Airport from 12 to 14 August, forcing the Airport Authority to cancel numerous flights. On 23 August, an estimated 210,000 people participated in the "Hong Kong Way" campaign to draw attention to the movement's five demands. The chain extended across the top of Lion Rock. Ignoring a police ban, thousands of protesters took to the streets of Hong Kong Island on 31 August following the arrests of high-profile pro-democracy activists and lawmakers the previous day. At night, the Special Tactical Squad (officially known as the Special Tactical Contingent) stormed Prince Edward station, where they beat and pepper-sprayed the commuters inside. On 4 September, Carrie Lam announced the formal withdrawal of the extradition bill once Legco reconvened in October and the introduction of additional measures to calm the situation. However, protests continued to push for the realisation of all five demands. Intensification and sieges of the universities On 1 October 2019, mass protests and violent conflict occurred between the protesters and police in various districts of Hong Kong during the 70th anniversary of the founding of the People's Republic of China. This resulted in the first use of live rounds by police. One 18-year-old student protester was shot in the chest by police in Tsuen Wan after charging towards a riot policeman. Carrie Lam invoked the Emergency Regulations Ordinance to impose a law to ban wearing face masks in public gatherings, attempting to curb the ongoing protests on 4 October. The law's enactment was followed by continued demonstrations in various districts of Hong Kong, blocking major thoroughfares, vandalising shops considered to be pro-Beijing and paralysing the MTR system. Protests and citywide flash rallies persisted throughout the month. Protesters clashed with the police late at night on 3 November 2019. Alex Chow Tsz-lok, a 22-year-old student at the Hong Kong University of Science and Technology (HKUST), was later found unconscious on the second floor of the estate's car park. He died on 8 November following two unsuccessful brain surgeries. After his death, protesters engaged in flash rallies against the police and attended vigils in various districts of Hong Kong. They blamed the police for his death, though the police denied any involvement. In response to Chow's death, protesters planned a city-wide strike starting on 11 November by disrupting transport in the morning in various districts of Hong Kong. That morning, a policeman fired live rounds in Sai Wan Ho, in response