Protest is a weapon for changed used all around the world. It's means to end injustice, oppression, and bring fairness to everyone, and students are often at the forefront of the tides of change. This gallery contains photos of Iowa State students who lay on the library floor for 4.5 minutes to protest the 4.5 hours Michael Brown's body lay on the street after he was killed by police in Missouri. Students called this a "die-in."