"I want to do biological research [to find a cure for] cancer, if it isn't discovered by then." So said future Led Zeppelin guitar great Jimmy Page to a TV program host who asked him his future plans, following the lad's performance on a BBC talent show in 1957. So, should we be disappointed that the 13-year-old didn't follow through with that lofty goal? Uh, no. Page is considered one of the world's greatest musicians, primarily known for his 12 years with the hard-rocking, eardrum-shattering Zeppelin. But long before joining up with Robert Plant, John Paul Jones and John Bonham in 1968, he was considered a hot commodity -- not only as a key member of seminal electric blues band The Yardbirds, but also as a highly sought-after session guitarist. His work can be heard on recordings by some of the most popular artists of the 1960s. Here's a look at some of them.