The US government was a fool for thinking it wouldn't get caught.<p>If a super privacy consious guy is locked in a room for years, and someone wants to deliver a new fire extinguisher, he is sure to check it out in a lot of detail!
The stickers on the window were probably actually to <i>prevent</i> spying by other people.<p>The embassy faces a public street, and anyone could have reflected a laser beam off a window.