Parades in New York and other major cities Sunday will feature increased security, anti-violence messages and tributes to those killed in this month's massacre at a gay nightclub in Florida. A year after New York City's storied gay pride parade celebrated a high point with the legalization of gay marriage nationwide, the atmosphere this year couldn't be more different.

A heavily armed police officer stands in the street near the parade route of the New York City Pride Parade Sunday, June 26, 2016, in New York City.