What do you want me to do? Call America and tell them I changed my mind?
After seeing the news that John Walker is the new Captain America, Bucky finds Sam at an Air Reserve Base to ask why he gave up the shield. Same prepares for a mission to Germany to continue investigating the Flag Smashers.
Dobbins Air Reserve base in Marietta, GA, specifically the main hangar at the east end of the base served as the location for the meeting of these two Avengers.
(The Falcon and The Winter Soldier S01E02, 2021)