Merlyn and his handler Matt Claussen were deployed to Ground Zero on September 24, working the night shift for five days.
Red, 11, from Annapolis, Maryland, went with Heather Roche to the Pentagon from September 16 until the 27 as part of the Bay Area Recovery Canines.
Handler Julie Noyes and Hoke were deployed to the World Trade Center from their home in Denver on September 24 and searched for five days.
Scout and another unknown dog lie among the rubble at Ground Zero, just two of nearly 100 search and rescue animals who helped to search for survivors.
www.vetstreet.com/dogs/retrieved-a-new-book-featuring-9-11-search-and-rescue-dogs