sentences:  Drug offenders account for over 500,000 of the more than 2 million people in America's prisons and jails, and drug offenses combined with failed drug tests account for a significant number of those returning to prison for parole and probation violations.Between 2001 and 2010, there were over 7 million pot arrests in the U.S. and of these arrests 88% were for simply having marijuana.These marijuana related arrests now account for over half of all drug related arrests in the United States.