Rock legends Led Zeppelin took the stage at their long-awaited reunion concert tonight with a blistering display of their greatest hits.The three surviving members of the iconic group — Robert Plant, Jimmy Page and John Paul Jones — were joined on stage by their late drummer John Bonham’s son Jason for the tribute show in honor of the late Ahmet Ertegun, the founder of Atlantic Records who launched Led Zeppelin in the US. (Profits from the show will support his education fund, granting college scholarships in Turkey, the UK and the U.S.)