THERE IS A DIFFERENCE BETWEEN "THREAT" AND "RISK". THE ACTUAL BIGGEST THREAT TO THE U.S IS PROBABLY NUKE WAR OR AN ASTEROID. THE BIGGEST RISK WOULD NOW BE BLM. OF COURSE THE THREAT OF A LARGE GROUP OF ARMED CRAZIES IS LARGE, BUT THE RISK IS LOW. THE BLM THREAT IS PERCIEVED TO BE LOWER , BUT THE RISK IS MUCH HIGHER.