Are the best medical schools in the states? Are medical schools in india, china, japan, england/uk, iraq, israel, etc., reputable? Would you attend?

Best is relative. Good medical schools and great doctors in every country. Generalizing possible, but misleading. Most medical education takes place during internship / residency. Best education is one that prepares you for practice in the society and culture you live in. Japanese schools are great for japanese physicians and likewise for the other countries.