recorded in the state of washington , where recreational use of marijuana was legalized in july of last year , the video shows each of the three ex-cops hits from a bong , before offering their thoughts , both funny and thoughtful , on the controversial substance .
` it 's like the last piece of prohibition , ' says robert , 73 , who worked as a police officer from 1970 to 1986 before performing criminal justice training for another decade .
` i think it should be legal -lsb- and -rsb- i think it should be more widely available for medical reasons .