It's been 20 years since Phil died. We determined that interviewing various colorful 'personalities' seemed a proper way to memorialize the anniversary of a great man. And by the way, Phil loved to interview people. The following represents a series of interviews which cover past, present and future topics which we feel form a vital resource to those interested in the ongoing AIDS crisis.    ANDY HUMM A journalist, commentator, LGBT activist and one of Phil's best friends. TOM SMITH A registered nurse, community leader, and Phil's former nurse. DR. JEFFREY GREENE A groundbreaking physician and medical researcher in the field of AIDS for the past 30 years, and Phil's former doctor. SHAREN I. DUKE The CEO of AIDS Service Center for the past 20 years. NAQUAN HARRELL A young, ambitious peer educator at AIDS Service Center. RUFINO COLÓN An experienced peer educator at AIDS Service Center, who has participated in the ASC poetry program. BRENDA MARSTON Curator of the Phil Zwickler Collection at Cornell University.