Most important for the people of 13, it was the center of the Capitol’s nuclear weapons development program. During the Dark Days, the rebels in 13 wrested control from the government forces, trained their nuclear missiles on the Capitol, and then struck a bargain: They would play dead in exchange for being left alone. The Capitol had another nuclear arsenal out west, but it couldn’t attack 13 without certain retaliation. It was forced to accept 13’s deal.