Exploring the Proton's Spin at PHENIX
  In late 2001 the first polarized proton collisions at the Relativistic Heavy Ion Collider (RHIC) took place. The PHENIX experiment at RHIC has a broad program to investigate the spin structure of the proton. This program will be described, and first results will be presented. 
C. Aidala (for the PHENIX Collaboration)