Fire safety workers keep back a crowd of spectators and participants as an interactive art installation by artist Michael Verdon called the “Temple of Essence” dedicated to "victims of the war on drugs" is burned on the U.S. National Mall in front of the Washington Monument (rear) in Washington November 22, 2015. People were encouraged to write personal messages on the temple walls and leave mementos behind inside the interactive art piece, which was the centerpiece of a 48-hour vigil called "Catharsis on the Mall: A Vigil for Healing the Drug War". (Photo by Jim Bourg/Reuters)





Ross Vidal spins a pair of LED "glow poi" in front of the Washington Monument during a 48-hour vigil called "Catharsis on the Mall: A Vigil for Healing the Drug War" on the U.S. National Mall in Washington November 21, 2015. (Photo by Jim Bourg/Reuters)





An interactive art installation created by artist Michael Verdon called the “Temple of Essence” dedicated to "victims of the war on drugs" is burned on the U.S. National Mall in front of the Washington Monument in Washington November 22, 2015. (Photo by Jim Bourg/Reuters)





A crowd watches as an interactive art installation created by artist Michael Verdon called the “Temple of Essence” and dedicated to victims of the "war on drugs" is burned on the U.S. National Mall in Washington November 22, 2015. (Photo by Jim Bourg/Reuters)





A fire safety worker watches a crowd of spectators and participants as an interactive art installation by artist Michael Verdon called the “Temple of Essence” and dedicated to "victims of the war on drugs" is burned on the U.S. National Mall in front of the Washington Monument in Washington November 22, 2015. (Photo by Jim Bourg/Reuters)





Fire performer Stanley Moore spins a fire sword as a crowd watches in front of the Washington Monument during a 48-hour vigil called "Catharsis on the Mall: A Vigil for Healing the Drug War" on the U.S. National Mall in Washington November 22, 2015. (Photo by Jim Bourg/Reuters)





Performer Ben Drexler spins a pair of "fire poi" in front of the Washington Monument during a 48-hour vigil called "Catharsis on the Mall: A Vigil for Healing the Drug War" on the U.S. National Mall in Washington November 22, 2015. (Photo by Jim Bourg/Reuters)





A fire safety worker tosses a piece of an interactive art installation by artist Michael Verdon called the “Temple of Essence” dedicated to "victims of the war on drugs" back into the fire as the installation is burned on the U.S. National Mall in Washington November 22, 2015. (Photo by Jim Bourg/Reuters)





A fire performer spins a pair of "fire fans" in front of the Washington Monument during a 48-hour vigil called "Catharsis on the Mall: A Vigil for Healing the Drug War" on the U.S. National Mall in Washington November 22, 2015. (Photo by Jim Bourg/Reuters)





Participant Ian Kreer exhales from an e-cigarette in front of the Washington Monument during a 48-hour vigil called "Catharsis on the Mall: A Vigil for Healing the Drug War" on the U.S. National Mall in Washington November 21, 2015. (Photo by Jim Bourg/Reuters)