
LONDONDERRY, NORTHERN IRELAND - MARCH 23: People carry the coffin of former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, during the funeral ceremony in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )

LONDONDERRY, NORTHERN IRELAND - MARCH 23: People attend the funeral ceremony, held for the former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )

LONDONDERRY, NORTHERN IRELAND - MARCH 23: People attend the funeral ceremony, held for the former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )

LONDONDERRY, NORTHERN IRELAND - MARCH 23: People attend the funeral ceremony, held for the former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )

LONDONDERRY, NORTHERN IRELAND - MARCH 23: People attend the funeral ceremony, held for the former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )

LONDONDERRY, NORTHERN IRELAND - MARCH 23: People carry the coffin of former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, during the funeral ceremony in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )

LONDONDERRY, NORTHERN IRELAND - MARCH 23: People carry the coffin of former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, during the funeral ceremony in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )

LONDONDERRY, NORTHERN IRELAND - MARCH 23: People attend the funeral ceremony, held for the former Irish Republican Army (IRA) chief of staff and Northern Ireland's former deputy First Minister, Martin McGuinness, in Londonderry, Northern Ireland on March 23, 2017. ( Oliver McVeigh - Anadolu Agency )