The question is answered...

thanks to Google. Have you been wondering all this time what a winglet is or did you already know like my brother and probably thousands of other people? Well, just in case you don't know, here's the Google definition. Winglets are "wing tip extensions which reduce lift induced drag and provide some extra lift." They have been used on 737s since the year 2000, now come in four different types and are typically 8'2" tall, 4' at the base tapering to about 2 feet at the top. Judging by the picture I saw winglets stick up at right angles at the ends of the planes wings.  I hope I can get a picture of a winglet on this trip. I don't think I've ever flown on a plane with winglets before.