The group of Hiroshima was at the head of the march,because Hiroshima is the first city in history destroyed by atomic bomb (August 6, 1945).
The monk was hitting the drum mourning with the words...
"I am the truth and i pray for peace in the world. Amore in Mind".
Leonidas Kirkos, Manolis Glezos and Gregoris Lambrakis were the leaders of the Greek group, marching right after Hiroshima.
The Aldermaston marches were anti-nuclear weapons demonstrations in the 1950s and 1960s, taking place on Easter weekend between the Atomic Weapons Research Establishment at Aldermaston in Berkshire, England, and London, over a distance of fifty-two miles, or roughly 83 km. At their height in the early 1960s they attracted tens of thousands of people and were the highlight of the Campaign for Nuclear Disarmament (CND) calendar.
The first major Aldermaston march was organised by the Direct Action Committee Against Nuclear War (DAC) over Easter (4–7 April), 1958, when several thousand people marched for four days from Trafalgar Square, London, to the Atomic Weapons Establishment to demonstrate their opposition to nuclear weapons.
After 1958 the marches were organised annually, 1959–1963, by CND, which reversed their direction, from Aldermaston to London.
A note with the hand writing of Gregoris Lambrakis, about his arrival to London (11 of April, 1963) and his meeting with Glezos and Kirkos.