The security operation in Belfast, Northern Ireland is on a scale not witnessed in the city before, with hundreds of public order officers flanking the anti-G8 rally.
Scores of fortified Land Rover-type vehicles were parked up on side streets ready to be deployed while police helicopters circled constantly overhead.
Police have made 260 temporary holding cells available for potential trouble-makers while 16 judges are on stand-by to preside over special courts.
So far any trouble has been restricted to a few individuals or small groups.
More top news
A major new discovery has been made towards finding the cause of multiple sclerosis (MS) - potentially paving the way for new treatments.
France will now decide on May 7 who will replace incumbent Francois Hollande as president.
Police said the child, who was without a driving licence, was trying to make his way 2,500 miles from the east coast to Perth.