Retired boxing legend Muhammad Ali has been awarded the Liberty Medal in Philadelphia.
The award was presented in a ceremony at the National Constitution Centre, recognising his long-time role as a fighter outside the ring for humanitarian causes, civil rights and religious freedom.
A frail Ali, 70, did not speak, but stood with assistance to receive the medal from his daughter Laila. His wife Lonnie said Ali was honoured and humbled to be a beacon of liberty.
Since hanging up his gloves in 1981, Ali has travelled extensively on international charitable missions and devoted his time to social causes.
Previous medal recipients include rock singer Bono, former South African president Nelson Mandela and former US president Jimmy Carter.