On October 18, 2019, a 4-cent increase on Santiago's Metro fare caused an uproar on the streets of the Chilean capital. The citizens' anger escalated quickly, leading to demands of immediate structural changes in the Chilean economic and social system. Alongside the people's call for change, daily clashes between protesters and the police led to excessive use of tear gas by the latter across the country.
Even though the use of tear gas is banned in warfare since 1925, police worldwide are allowed to use it for the sole purpose of scattering protesters, as had happened in Chile. The most iconic example can be seen in Plaza Dignidad (Dignity Square), previously known as Plaza Italia ahead of the social outbreak that erupted in the country: everyday, a camera records the activities around the iconic roundabout, capturing the constant and excessive use of lachrymatory gas every Friday.