Despite decades of animosity, the two neighbours have become major trading partners, says the BBC's Cindy Sui in Taipei.

BBC: China-Taiwan trade pact sparks street protest in Taipei

The animosity between the two men increased, and Sharif dispatched his brother and the ISI chief to Washington in mid-September to sound a warning.

CNN: ASIANOW - TIME Asia | Pakistan: Under the Gun--Page 2

Also included is a typed, undated draft letter from John Lennon to Linda and Paul McCartney that reflects the deep animosity between the two Beatles around the time of the foursome's formal 1971 breakup.

WSJ: Monroe, Eisenhower letters to be auctioned