NEW : This means the product will ship as received by the manufacturer, sealed, with all advertised components, and with the manufacturer warranty. Sebastian Coe says he is `` extraordinarily impressed with '' security contractor G4S . An extra 3,500 troops to be brought in to cover a shortfall in security staff . G4S says it has about 4,000 people at work across 100 venues ; more undergoing training .
NEW : Security firm G4S says young people employed for the Olympics will do a good job . Sebastian Coe says he is `` extraordinarily impressed with '' security contractor G4S . An extra 3,500 troops to be brought in to cover a shortfall in security staff . G4S says it has about 4,000 people at work across 100 venues ; more undergoing training .