Caesar salad turns 100

Restaurants all over the world serve Caesar salads. It's pretty simple: romaine lettuce, crunchy croutons and a dressing made with lemon or lime juice, anchovies, Dijon mustard, Parmesan cheese and black pepper. This year marks the 100th anniversary of the Caesar salad. And while its name might make you think of a Roman emperor, KPBS reporter Katie Anastas tells us the salad has its origins south of the US border.