It's been 50 years since the Beatles made their debut in the United States. While I was never much of a Beatles fan (I was too young at 4 years old), I do recognize many of their songs and remember listening to their hits on the radio. The girl in the next picture looks as though she could have been a screaming, crazy fan. Although I was not a Beatles' fan, I associate yellow with my youth in the 1960's, and I can't really say why. Maybe it was the yellow submarine, maybe the mustard yellow…