I'll start with the Egyptian elections...don't have any clue how it matters, but surely it fits. Then there's the Euromess, for all sorts of reasons. Did anything that matters happen in the Iran negotiations? I don't think so.
Back in the US...I don't know that any of the campaign stuff this week mattered, outside of the House primaries on Tuesday. I strongly suspect, for whatever it's worth, that the SpaceX launch matters. Don't know whether anyone will agree with me on that, but I suspect it easily tops the Facebook stock stuff. Oh, and I'm not sure if it's really this week, but there was an AP story about the Army no longer taking new recruits last year with various black marks, now that the recruiting pinch of the Iraq war is over, with the Army (apparently?) surviving the last decade in pretty good shape. There were quite a few scare stories in the middle of the last decade about what Iraq was doing to the Army, but it seems to me those turned out, eventually, to be a false alarm. Anyway, I'll say that might matter.
What else? What do you think mattered this week?