The Security-Industrial Complex (Forbes.com) Forbes.com - Security is a very big and growing tech business. Cumulative private and public sector security spending in the U.S. is forecast to exceed  #36;1 trillion over the coming decade. The punditocracy has analogized this post-Sept. 11 trend to Cold War-era military spending; homeland security will be a short-term economic stimulus but, ultimately, like military spending, a drag on the nation's domestic production.