This revision builds on the success of 1e: review questions and answers that mimic the EM in-service residency exam and the EM boards. These questions cover a wide range of topics in emergency medicine, identistry, trauma, obstetrics, pediatrics, toxicology, environmental, radiology, dermatology, EMS, and bioterrorism . Concise rationale for the correct and incorrect answers is discussed. Sources for answer explanations include all currently available authoritative EM textbooks. 1) 1000 questions, randomly divided into 10 tests of 100 questions. 2) topics include all areas of Emergency Medicine, including internal medicine and surgery specialty areas, dentistry, trauma, obstetrics, pediatrics, toxicology, environmental, radiology, dermatology, EMS, and bioterrorism. 3) questions are case-based, and 10% involve interpreting an image.