Mr Hague also used his visit to announce a boost in funding for the preservation of Bletchley Park, the forerunner to GCHQ.

BBC: Cybercrime-fighters seek 'generation Xbox' for spy jobs

The preservation workers from New York's Central Park Conservancy were removing rust from the antique cannon, which once fired munitions aboard the British warship H.

CNN: STORY HIGHLIGHTS

The preservation workers from New York's Central Park Conservancy were removing rust from the antique cannon, which once fired munitions aboard the British warship HMS Hussar, when they made the explosive discovery, New York police Detective Brian Sessa said.

CNN: STORY HIGHLIGHTS

The proposed designation, called National Landscape Monuments, would give the Bureau of Land Management a new role in land preservation, one that has traditionally gone to the National Park Service.

CNN: Nature - Babbitt pushes land protection initiative