Data collection can begin! This night the luminosity ("collision rate") was negligible (0.05% of the design value), but it should go up quickly as more and more bunches are filled in for the runs. By August we might know if the diphoton excess is something real or just an extremely weird statistical fluctuation. Edit: Another run, now with 0.2% the design luminosity. Edit2: Another run, 0.4% of the design luminosity.