an exclusive club. the other day elizabeth sullivan turned 104 years old. there have been 18 u.s. presidents during her lifetime starting with taft. gary tuchman met her today. take a look. >> reporter: elizabeth sullivan has lived in the same ft. worth, texas, house since 1942. >> i'm glad for you to come in. >> reporter: she has just celebrated her 104th birthday. as the big balloons in her living room made clear. you had your driver's license until last january? you were 103? >> i was driving everywhere. >> you were? >> i was going to church i was going to the woman's club i was playing bridge. i was doing everything. >> reporter: she credits at least some of her longevity to a lone star state favorite. you're drinking dr. pepper right now.