By Joanna Plucinska, Koh Gui Qing, Alicja Ptak and Steve Stecklow. : WARSAW (Reuters) - On a frigid morning in January, Polish internal security officers entered the Warsaw apartment of a foreign businessman, confiscated photographs, seized his electronic devices and detained him. The allegations leveled against him were sensational: An ex-diplomat who speaks Polish, he and a former Polish security official had spied on behalf of a foreign power. The drama had elements of a classic Cold War thriller, updated for the 21st century.