It's graduation day for the Bossier Sheriff's Young Marines program.  A ceremony at 6:30 this evening at the Bossier Sheriff's Substation on Viking Drive will recognize the 42 recruits to make up Class-22.  They've just finished 13 weeks of training in such areas as rank structure, wilderness survival, team motivation and confidence-building skills and, of course, physical training exercises.  Since the Bossier Sheriff's Office started its Young Marines program in 2002, nearly 900 young men and women -- aged 8-to-17 -- have gone through the program.