ATLAS <a target="_blank" href="exp/LHC/Big_Bang_Day_files/FirstBeamImage.png">First Beam image</a>... and it was triggered by l1Calo.
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It was <a target="_blank" href="http://www.ep.ph.bham.ac.uk/exp/LHC/Big_Bang_Day.html">Big Bang Day @ Birmingham</a> on 10<sup>th</sup> Sep 2008.<br>