Utah Transit Authority officer Chad Ziegenhorn and his K-9 partner, Bobbie, demonstrate their job in explosives detection on a TRAX train Wednesday. Bobbie is trained to find and investigate suspicious or unattended bags and packages, signaling to an officer or “pointing” when he detects one of the 20 odors he’s been taught to find. The 7-year-old German shorthaired pointer has served in the U.S. Marine Corps and the West Valley City Police Department, and is skilled in working in public places around crowds, children and other animals. Bobbie will help enhance proactive security measures on the system, UTA Police Chief Fred Ross said in a statement. Ziegenhorn said Bobbie is a friendly dog who loves to play. UTA riders are free to come up and say hello, but please check with Bobbie's attending officer first to make sure you’re not interrupting his work.