A 70-year-old grandma is taking on a job that's usually filled by high school teenagers. Robin Borland is on duty working as a lifeguard at a city swimming pool in Philadelphia. The last time she worked as a lifeguard was 54 years ago. After two knee replacements, three kids and six grandchildren, she's back on the job. Borland got no breaks for being a granny. She went through the same rigorous lifeguard testing as everyone else.