"No Kings" protests against the Trump administration are taking place today in and around New York City as part of nationwide demonstrations. Fifth Avenue was closed to traffic from 42nd Street to 23rd Street in Manhattan as protesters marched from Bryant Park.

A bystander was fatally shot after security members at the demonstration confronted a man who was running toward the crowd with an AR-15-style rifle, the police said.

The First Amendment of the U.S. Constitution and Article I Section 8 of the New York State Constitution protects freedom of speech, assembly, and petition. While not an exhaustive list, here are a few rules New York protestors must follow, according to the NYCLU:

Those millions included an estimated 200,000 people in Los Angeles, 100,000 in Philadelphia, 70,000 in Seattle and over 50,000 in New York.

The No Kings Day of Defiance protests will happen during the military parade in Washington on Saturday for the Army’s 250th anniversary — which coincides with Trump’s birthday.

Many thousands of protesters jammed the streets around Manhattan’s Bryant Park on Saturday afternoon, defying the drizzle and chanting “No ICE! No KKK! No fascist USA!” before spilling into an enormous march down Fifth Avenue.

The New Orleans event wound through the streets of the Marigny before ending in Washington Square Park with a rally that drew community members and elected leaders.

New York City saw thousands attend demonstrations against the Trump administration Saturday, just hours before a military parade in Washington, D.C. MSNBC host Antonia Hylton is joined at the New York City “No Kings Day” protest by actor and activist Mark Ruffalo,