Complex sentence: The British and French vetoed an American-sponsored resolution in the UN Security Council calling for an end to the Israeli invasion; they then issued their own call for both Israel and Egypt to withdraw from within 16 km of the Suez Canal.
Split into simpler sentences: The British and French vetoed an American-sponsored resolution in the UN Security Council calling for an end to the Israeli invasion. They then issued their own call for both Israel and Egypt to withdraw from within 16 km of the Suez Canal.