Lance Cpl. U.S. Marine veteran Jeff DeYoung says goodbye to his dog Cena, a 10-year-old black lab who was a military bomb-sniffing dog aboard the LST 393 where he was put down in downtown Muskegon on Wednesday, July 26, 2017. Cena was diagnosed with an aggressive form of bone cancer after DeYoung noticed he wasn't putting weight on his front left leg. (Joel Bissell | MLive.com)