Robert Aymar, CERN Director-General uses a mechanical shovel during the ground breaking ceremony of the Linac 4 (Linear Accelerator 4) at the European Organisation for Nuclear Research (CERN) in Meyrin near Geneva October 16, 2008. The current accelerator, built in 1978 and which will be replaced in 2013 by Linac 4, separates hydrogen gas into electrons and protons and provides protons beams to the LHC (Large Hadron Collider) that scientists at the CERN use to re-enact the conditions of the "Big Bang" that created the universe. REUTERS/Denis Balibouse(SWITZERLAND)