This may have been ameliorated by the winter of 1939, at which point a number of articles about the Norden appeared in the U.S. popular press with reasonably accurate descriptions of its basic workings. But when these were traced back to the press corps at the U.S. Army Air Corps, the U.S. Navy was apoplectic. Instead of accepting it was now in the public domain, any discussion about the Norden was immediately shut down. This drove both the British Air Ministry and Royal Navy to increasingly anti-American attitudes when they considered sharing their own developments, notably newer ASDIC systems. By 1940 the situation on scientific exchange was entirely deadlocked as a result.