Metallica have announced a takeover of San Francisco to coincide with their upcoming 40th anniversary shows in the city.The legendary metal band, who formed back in 1981, are scheduled to perform two celebratory headline concerts at San Fran’s Chase Center arena next month (December 17/19).Yesterday (November 17) James Hetfield and co. outlined plans to “take over the city of San Francisco” between December 16-19 with a series of special events.