The nature and the origin of ultra-high energy cosmic rays (UHECRs). above 1017 eV. are still unknown. The Pierre Auger Observatory with its huge exposure provides us with a large set of high quality data. https://www.nacrack.com/amazing-price-1997-2000-BMW-528I-Front-Bumper-Reinforcement-Bar-Used-Original-Exterior-OEM-great-save/