William D. Leahy
Philadelphia underwent overhaul at the Philadelphia Navy Yard and then refresher training in the West Indies, returning to Norfolk, Virginia, on 4 June 1945. She steamed for Antwerp, Belgium on 7 July, acting as escort for which had embarked President Harry S. Truman and his party, including Secretary of State James F. Byrnes and Fleet Admiral William D. Leahy. Arriving Antwerp on 15 July, the President departed "Augusta" and was flown to the Potsdam Conference. Before the conference ended, "Philadelphia" proceeded to Plymouth, England, to await return of the President.