PatriotGrid is a group of distributed computing projects whose goal is to identify new leads for vaccines or cures for agents known to be potential bioterrorism weapons. To participate in PatriotGrid, users download a free, non-invasive screen saver from grid.org. The screen saver unobtrusively donates the user's extra processing power by recognizing when the user's computer is idle and linking up to a world-wide computer grid coordinated by United Devices. The grid of volunteer processing power acts as a supercomputer capable of running 1 trillion computations per second. PatriotGrid is being promoted as a way for ordinary citizens around the world to actively participate against the threat of bioterrorism.