Crew members walk up the launching ramp on the flight deck of Britain's Royal Navy's HMS Prince of Wales, during a media opportunity whilst it's moored to the quayside in Liverpool, north west England on February 29, 2020. - HMS Prince of Wales, the second of the Royal Navy's QE Class aircraft carriers, is in Liverpool for a week-long visit. (PAUL ELLIS/AFP via Getty Images)This Friday, Feb. 28, 2020, photo provided by the North Korean government shows the military drill of units of the Korean People's Army in North Korea. State media KCNA said North Korean leader Kim Jong Un supervised a military drill that simulated an attack on an island target. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: "KCNA" which is the abbreviation for Korean Central News Agency. (Korean Central News Agency/Korea News Service via AP)US Marines disembark from amphibious assault vehicles during the joint Cobra Gold exercise in the coastal Thai province of Rayong on February 28, 2020. (LILLIAN SUWANRUMPHA/AFP via Getty Images)An Israeli army Merkava IV battle tank is seen in the Israeli-annexed Golan Heights on the border with Syria on February 24, 2020. (JALAA MAREY/AFP via Getty Images)Members of the "Syrian National Army", an alliance of Turkey-backed rebel groups, ride in a tracked vehicle modified as a bulldozer in the town of Sarmin, about 8 kilometres southeast of the city of Idlib in northwestern Syria, on February 24, 2020, as they take part in a military offensive on the village of Nayrab following an artillery barrage fired by Turkish forces. (Photo by Omar HAJ KADOUR / AFP) (Photo by OMAR HAJ KADOUR/AFP via Getty Images)A picture taken on February 28, 2020 shows a Turkish military helmet at the site of regime air strikes in the village of Balyun in Syria's northwestern Idlib province. - At least 33 Turkish soldiers were killed as violence escalates in Syria's Idlib province after an air strike blamed on Damascus, with NATO chief Jens Stoltenberg condemning "indiscriminate" attacks by the Assad regime and Russia. (OMAR HAJ KADOUR/AFP via Getty Images)Turkish-backed Syrian rebels drive down a road near the town Taftanaz in northeastern Idlib province, on February 28, 2020. - The leaders of Russia and Turkey held crisis talks Friday after 33 Turkish soldiers were killed in a regime air strike in Syria, triggering fears of a dangerous escalation of tensions. The attack by Russian-backed Syrian forces took place late Thursday in the northwestern province of Idlib, where President Bashar al-Assad is waging a bloody campaign to oust rebels from their last holdout. (OMAR HAJ KADOUR/AFP via Getty Images)