Former DC Rollergirl Kristen Clark has worked at the National Zoo since 2005, volunteering there for several years before landing her dream job. Clark is assigned to the Great Cats & Bears unit, where she is one of two primary lion keepers. During her work day, which usually begins at 6:30 a.m., she’s responsible for looking after the lions, caracals, coatis and sometimes the prairie dogs. I was lucky enough to be able to spend some time with her and her charges last Sunday.