In Santiago de Compostela, I attended the prayer for peace, at the convent of San Francisco (everyday at 7:00 pm).
During the celebration, the monk put a song of Friar Alessandro ("Make me a Channel of Your Peace", based on St Francis' prayer for peace), and proposed that we would give each other a hug, as a sign of peace.
After a moment of hesitation, everybody was hugging each other to give him or her a strong sign of love.
I was really impressed. This simple gesture - a hug - had made all of us brothers and sisters.