The childhood house (pink) of late boxing champion Muhammad Ali is seen in the background as well-wishers surround a hearse carrying his body during his funeral procession through Louisville, Kentucky, U.S., June 10, 2016. REUTERS/Adrees Latif

The hearse (center, L) carrying the remains of Muhammad Ali leaves the A D Porter & Sons funeral home during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, U.S., June 10, 2016. REUTERS/Adrees Latif

A hearse carrying the body of the late Muhammad Ali drives down Muhammad Ali Boulevard to Cave Hill Cemetery in Louisville, Kentucky, U.S. June 10, 2016. Earlier in the day, an estimated 100,000 people holding signs and chanting, "Ali! Ali!" lined the streets as a hearse carrying his cherry-red casket made its way past his childhood home to Louisville's Cave Hill Cemetery, where a private burial service was held for the three-time heavyweight champion of the world. REUTERS/John Sommers II

Mourners gather outside Muhammad Ali's childhood home before a funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, U.S., June 10, 2016. Earlier in the day, an estimated 100,000 people holding signs and chanting, "Ali! Ali!" lined the streets as a hearse carrying his cherry-red casket made its way past his childhood home to Louisville's Cave Hill Cemetery, where a private burial service was held for the three-time heavyweight champion of the world. REUTERS/Carlos Barria

A hearse carrying the body of the late Muhammad Ali enters Cave Hill Cemetery in Louisville, Kentucky, U.S. June 10, 2016. Earlier in the day, an estimated 100,000 people holding signs and chanting, "Ali! Ali!" lined the streets as a hearse carrying his cherry-red casket made its way past his childhood home to Louisville's Cave Hill Cemetery, where a private burial service was held for the three-time heavyweight champion of the world. REUTERS/John Sommers II

A hearse carrying the body of the late Muhammad Ali enters Cave Hill Cemetery in Louisville, Kentucky, U.S. June 10, 2016. Earlier in the day, an estimated 100,000 people holding signs and chanting, "Ali! Ali!" lined the streets as a hearse carrying his cherry-red casket made its way past his childhood home to Louisville's Cave Hill Cemetery, where a private burial service was held for the three-time heavyweight champion of the world. REUTERS/John Sommers II