A Chihuahua ran across California’s San Francisco-Oakland Bay Bridge, which is a very big bridge. A police officer on a motorcycle chased the 4.5-kilogram dog.
Eventually, the police caught the Chihuahua. The officers are looking to reunite the dog with his owner.
Difficult words: bay (the part of the sea that goes inland), chase (to follow and to try to catch), reunite (to bring together).