Hong Kong Rocked By Violent Protests In Response To Mask Ban

In response to a government ban on face masks at demonstrations, protests in Hong Kong escalated into violence, leading to the shutdown of the metro system and closure of businesses. A 14-year-old boy was critically injured by police, marking the second shooting incident. Hong Kong's leader, Carrie Lam, defended the mask ban and condemned the violence. Pro-democracy lawmakers challenged the ban legally, while the UN called for an investigation into the protests' handling.

How did Hong Kong's leader Carrie Lam justify the mask ban?

What legal action did pro-democracy lawmakers take against the mask ban?