Lance Cpl. Mamadou Tamboura, and infantryman with 1st Battalion 9th Marines, shows New York children the Mark 19 grenade launcher during Marine Day in Times Square, May 26. Marine Day is part of Fleet Week New York 2012, where Marines and sailors show New Yorkers Marine Corps weapons, equipment and culture. - Lance Cpl. Mamadou Tamboura, and infantryman with 1st Battalion 9th Marines, shows New York children the Mark 19 grenade launcher during Marine Day in Times Square, May 26. Marine Day is part of Fleet Week New York 2012, where Marines and sailors show New Yorkers Marine Corps weapons, equipment and culture.