KUWAIT (Reuters) - Kuwaiti police used teargas and stun grenades to disperse demonstrators trying to march on Sunday in a demonstration to protest against changes to election laws seen by the opposition as favoring pro-government candidates, Reuters witnesses said. They said demonstrators had gathered in various parts of the capital to march towards the government headquarters. Riot police surrounded some of the protests, gave them a few minutes to disperse and then showered them with teargas and percussion grenades. ...