It is not often that a handshake has such power to titillate. But then it depends on who is doing the shaking. Barack Obama and Raúl Castro briefly greeted each other when they met on Tuesday at the memorial service of former South African president Nelson Mandela – only the second time that leaders of the two countries are known to have shaken hands since 1960, when the two countries broke off diplomatic relations. Yet it is hard to read too much into this. In fact, it would have been awkward for the two leaders to have avoided it.
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