thursday june 26 National HIV Testing Day Today and tomorrow, Planned Parenthood offers free AIDS tests and counseling. 8:30 a.m.-6 p.m. At various locations: Fannin Clinic, 3601 Fannin, 529-8844; Southwest Clinic, 6121 Hillcroft, Suite O, 272-0544; Greenspoint Clinic, 11834 Airline, (281) 445-4553; Stafford Clinic, 3727 Greenbriar, Suite 118, Stafford, (281)…