crowd of people gathered, most of whom are wearing purple t-shirts with "SEIU 2015" printed on the back

crowd of people gathered, most of whom are wearing purple t-shirts with "SEIU 2015" printed on the back. Many are also waving small American flags. They appear to be at a rally or demonstration, as they are standing in front of a large building in an urban area. The people are cheering and raising their fists in the air, creating a sense of solidarity and purpose.