Indeed the Post doesn't mention the highly newsworthy fact that the news media stories are so mutually contradictory. That they are really part of NATO's public relations effort, dutifully reporting whatever they are told without pointing out the implications of NATO's ever-evolving explanations. The phrase suggests maps books or perhaps fold-up maps, the kind you take on a road trip. We are after all talking about the combined armed forces of the U.S. and most of Europe. The whole focus of their attack on Serbia is aerial bombardment.
Aerial bombardment depends primarily on maps and intelligence.
Unless of course NATO wanted them to be bombed. Of course NATO had up to date maps of the area around the Chinese Embassy. And of every square inch inside the Embassy and complete dossiers on all the people working in the Embassy as well. We are told they didn't see the Embassy. Forget everything we've said so far.