Two beams for Cern
The big "switch-on" of the Large Hadron collider has exceeded everyone's wildest expectations.
A few moments ago the operations team managed to get both streams of protons circulating in opposite directions around the whole ring. Speaking in the main control room a delighted director general Robert Aymar declared: "It is now time for the physics to begin."
Things had got off to a shaky start earlier in the day. You could see the strain etched on the faces of control room staff - and the hundreds of physicists, engineers and support staff who had crammed in to every conceivable corner of the room to watch.
And then, just a few minutes behind schedule, came the moment everyone had been waiting for: first beam.
Since then things have developed rapidly.
Lyn Evans had allowed for a whole day to get the beam round the whole machine once. Riding the wave he ordered the injection of the second beam to be brought forward. Astonishingly that's now completed its own journey going in the other direction.
All in all a staggering success, and a great day for physics....the LHC works. Now, where's that Higgs Boson?