Puerto Rican hip-hop duo Calle 13 presented its latest video in which, with the collaboration of Unicef, the two artists denounce the harm that arms and violence do to the world with their song “La Bala” (The Bullet).

“This is a very important subject, besides being one of my favorites, because in many countries we are in a state of emergency in terms of unchecked violence,” lead singer Rene Perez, a.k.a. “Residente,” told a press conference here.