What is "trakr"

Trakr ( c.1994 - April 2009) was a German Shepherd police dog who along with his handler, Canadian police officer James Symington, discovered the last survivor of the September 11 attacks at the World Trade Center in New York City in 2001. For his accomplishments, Trakr was named one of history’s most heroic animals by Time magazine. In 2008 Symington won an essay contest sponsored by BioArts International to find the world's most "cloneworthy dog", as a result of which Trakr was cloned, producing five puppies.