Is that not your ’48-star’ US flag? The pic couldn’t have been taken after 4th July 1959, when you replaced it with the 49-star version.
I would be pretty sure that’s a Polish flag to the right. I’m wondering if the guy in the light-coloured greatcoat (next to the chubby guy in the forage cap with all the gongs) might be General Władysław Sikorski, Poland’s military and government leader in exile at the beginning of WWII. I’m going more by the cap than anything. He had a sparse, pale-coloured moustache that often doesn’t show up in pictures. Here he is in 1941 on a visit to Britain.
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He visited the US in March 1941, March 1942 and December 1942 but was killed in a mysterious plane crash in 1943.