Because of the serious nature of drug crimes like drug trafficking, drug smuggling and drug manufacturing, these crimes are punished harshly in the federal court system. Many drug crimes are not only subject to the federal sentencing guidelines, but also involve mandatory minimum sentences, which are calculated based on the type and amount of the drug involved. For instance, the crime of trafficking in 100 grams or more of heroin carries a minimum sentence of five years, while trafficking in one kilogram or more of heroin carries a minimum sentence of 10 years.