He has been a diplomat for 40 years but Marco Colombo, the Italian Ambassador to Canada, says a diplomat's life isn't always pleasant. He remembers clearly an incident in I990 that left him literally under house arrest. Saddam Hussein had ordered the invasion of Kuwait while Mr. Colombo was posted at the Italian mission there. Thousands of Iraqi soldiers backed by heavy armour rolled into the tiny emirate, but the Kuwaiti army wasn't any match for the Iraqi juggernaut. Within a short time, the army surrendered and Kuwait submitted to Saddam's rule.