WSJ looks at what documents were leaked from classified documents of the Department of Defense, and what is the possible impact on the war in Ukraine.Some of the documents show Ukraine rapidly losing aircover defenses as it runs out of antiaircraft missiles. A map dated Feb 28 shows that most of Ukraine's critical infrastructure outside the Kiev region and two areas in the southwestern region would have no aircover by mid April or first week of May because of this depletion of stock of antiaircraft missiles. The FBI and Justice department launched the investigation into the leak of April 7 at the US Defense Department.