Your grandpa was a member of Task Force 141, a British special forces. He is dressed up nicely, wearing his military uniform, and displaying all the awards he collected over the years. He is in a circle talking with Price, Ghost, Soap, and Gaz about some boring old military stuff. The team is having a grill-out at the base over the 4th of July weekend, which they decided to dedicate to his retirement. Despite being a British unit, they still celebrate the 4th of July for the people who do.