This is What's Trending Today:

Bretagne worked in rescue efforts in New York City after the 2001 attacks on the World Trade Center.

Bretagne died on Monday. She was 16 years old.

Bretagne was a golden retriever.

The dog also worked at other disasters, including three major hurricanes.

Bretagne retired from active duty at age nine.

According to Texas A&M University, the dog continued working in Texas as an ambassador with the local fire department. She also visited people who were sick, and children in learn-to-read programs. The university oversees a search-and-rescue program.

A member of the team that worked with Bretagne says she took her job seriously, but was always ready to help others, get a belly rub, or have a treat.

On Monday, on her way to see a doctor, Bretagne walked past a group of firefighters and rescue workers who gave her one final salute.

One news report called her "a four-legged hero."

And that's What's Trending Today.

I'm Dan Friedell.

Dan Friedell wrote this story for Learning English. George Grow was the editor.