Tensions over Syria are expected to dominate a summit of the world’s major economies being held in Russia in the run-up to an expected US military assault which host Vladimir Putin has warned would be an act of aggression.

SENATOR George S McGovern is probably best remembered as the Democrat Party’s nominee defeated by Richard Nixon in the US presidential election of 1972, but the tactics used, especially in the Watergate building, led to Nixon’s resignation less than two years later.