In the U.S., hundreds of thousands of demonstrators were expected to turn out, many protesting the policies of President Trump.
In New York, chants of “Sí se puede” and “the people united will never be defeated” bellowed through Union Square Park.
Demonstrators came from across the nation to protest a variety of issues ranging from the Black Lives Matter movement and refugees to climate change and the Puerto Rico debt crisis.
She said Trump supporters and the mainstream media think of such efforts as "small and ineffective." "If you study history it is these type of actions, the people marching on the streets, that actually make history," she said.
Perez, a grad student studying at CUNY-Hunter, is a native of the island territory.