As the RAF marks its centenary, Aled Jones is at the Rhyl Air Show in north Wales to hear the extraordinary stories of two Second World War pilots, Welsh local hero David Lord, who was awarded a posthumous Victoria Cross, and 97-year-old Ernie Holmes, a Lancaster bomber pilot who miraculously survived being shot down over occupied territory.Josie d'Arby visits Winchester Cathedral 100 years after a simple gravestone inscription inspired the creation of the worldwide movement Alcoholics Anonymous.And the programme meets Christian Joey G, who is using rap music to bring the message of Jesus to the young people of north Wales. There is also a special performance by Blake and The Military Wives Choir, as well as hymns and songs from north Wales and across the UK.