A volunteer lowers the first inflated sphere into MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. The installation will feature about 3,000 inflatable hand-painted spheres. (Photo by Mario Anzuoni/Reuters)

Volunteer Aaron Diaz holds inflated spheres after they were lowered into MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteer Aaron Diaz holds inflated spheres after they were lowered into MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers carry inflated spheres to be lowered into MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers carry inflated spheres to be lowered into MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Portraits of Hope co-founder Ed Massey moves inflated spheres to be lowered in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers transport an inflated sphere into a canoe to be lowered in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers transport an inflated sphere to be lowered in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Inflated spheres are pictured in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

People watch inflated spheres in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers wait by inflated spheres to be lowered into MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Inflated spheres are pictured in MacArthur Park Lake, with the downtown skyline in the background, during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

A person takes a photo of inflated spheres in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers transport an inflated sphere to be lowered in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

A street performer is pictured between inflated spheres in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Inflated spheres are pictured in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers transport aboard a boat, inflated spheres to be lowered into MacArthur Park Lake, during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers lower an inflated sphere into MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Inflated spheres are pictured in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Volunteers wait to load an inflated sphere into a canoe to be lowered in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)

Inflated spheres are pictured before being lowered in MacArthur Park Lake during the installation of Portraits of Hope's exhibition “Spheres at MacArthur Park” in Los Angeles, California August 21, 2015. (Photo by Mario Anzuoni/Reuters)