In this Thursday, June 21, 2018 file photo, Britain s Foreign Secretary Boris Johnson lays a wreath at the Tomb of the Unknown Soldier with his Polish counterpart Jacek Czaputowicz in Warsaw, Poland. Poland is reviving plans to reconstruct a historic Warsaw palace where the German Enigma machine codes were first cracked in 1932 and which Nazi German occupying forces blew up in 1944, it was announced Wednesday, July 7, 2021. (AP Photo/Czarek Sokolowski, file)
WARSAW, Poland (AP) Poland is reviving plans to reconstruct a historic Warsaw palace where the German Enigma machine codes were first cracked in 1932 and which Nazi German occupying forces blew up in 1944.