General George Casey, former U.S. Army chief of staff, discussed national security, terrorism and the threat of nuclear weapons at a talk Tuesday evening.

Former U.S. Army Chief of Staff Discusses National Security

General George Casey — former chief of staff of the United States Army and a commander in the Iraq War — spoke Tuesday about the evolution of national security in a talk hosted by Cornell’s Political Union. Casey began his talk by analyzing threats to national security, which he said have changed fundamentally in the past few decades. While the U.S. was primarily concerned with fighting other armies in the 1970s, the world changed on Sept. 11, 2001, according to Casey. “This struggle that we’re involved with …