The United States is continuing military drills in South Korea amidst heightened tensions with the North Korean regime. On Sunday, the U.S. Air Force deployed F-22 fighter jets to its main base in South Korea, two days after North Korea put its rocket units on standby for potential attack on U.S. bases. North Korea also said it is entering a “state of war” with South Korea, but few expect it to conduct any aggressive action beyond verbal threats.