A group of U.S. Marines walk along a snow-covered trail during their advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
A U.S. Marine takes his position during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
A group of U.S. Marines walk along a snow-covered trail during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
A U.S. Marine walks into a tent during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Saturday, Feb. 9, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
A group of U.S. Marines walk along a snow-covered trail during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
U.S. Marines take their positions during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
Maj. Gen. William F. Mullen, head of the Marine's Training and Education Command, listens to a debrief during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. (AP Photo/Jae C. Hong)
U.S. Marines boils water in a trench during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Saturday, Feb. 9, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
U.S. Marines gather for a debrief during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
A U.S. Marine sits in a trench during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Saturday, Feb. 9, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
U.S. Marines walk along a snow-covered trail during their advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Sunday, Feb. 10, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
2nd Lt. Brendan Dixon, of Hampton Roads, Va., listens to Col. Kevin Hutchison during advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Saturday, Feb. 9, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
Empty MRE packages are covered in snow as U.S. Marines prepare for advanced cold-weather training at the Marine Corps Mountain Warfare Training Center Saturday, Feb. 9, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
A U.S. Marine covers a machine gun in a trench while preparing for advanced cold-weather training at the Marine Corps Mountain Warfare Training Center on Saturday, Feb. 9, 2019, in Bridgeport, Calif. After 17 years of war against Taliban and al-Qaida-linked insurgents, the military is shifting its focus to better prepare for great-power competition with Russia and China, and against unpredictable foes such as North Korea and Iran. (AP Photo/Jae C. Hong)
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