![U.S. Army Master Sgt. Nathan Greer, right, U.S. Army Alaska jump master, gives a hand signal to Japan Ground Self-Defense Force soldiers assigned to the 1st Airborne Brigade over Hiju-dai drop zone, U.S. Army Master Sgt. Nathan Greer, right, U.S. Army Alaska jump master, gives a hand signal to Japan Ground Self-Defense Force soldiers assigned to the 1st Airborne Brigade over Hiju-dai drop zone,](https://c8.alamy.com/comp/R2RPXF/us-army-master-sgt-nathan-greer-right-us-army-alaska-jump-master-gives-a-hand-signal-to-japan-ground-self-defense-force-soldiers-assigned-to-the-1st-airborne-brigade-over-hiju-dai-drop-zone-oita-prefecture-japan-nov-4-2018-during-keen-sword-19-approximately-280-jgsdf-personnel-conducted-jump-training-from-us-air-force-c-130j-super-hercules-for-the-first-time-in-japan-R2RPXF.jpg)
U.S. Army Master Sgt. Nathan Greer, right, U.S. Army Alaska jump master, gives a hand signal to Japan Ground Self-Defense Force soldiers assigned to the 1st Airborne Brigade over Hiju-dai drop zone,
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![U.S. Army Master Sgt. Nathan Greer, U.S. Army Alaska jump master, takes a breath after supporting Japan Ground Self-Defense Force soldiers jumping from a U.S. Air Force C-130J Super Hercules assigned to U.S. Army Master Sgt. Nathan Greer, U.S. Army Alaska jump master, takes a breath after supporting Japan Ground Self-Defense Force soldiers jumping from a U.S. Air Force C-130J Super Hercules assigned to](https://c8.alamy.com/comp/R2RPYB/us-army-master-sgt-nathan-greer-us-army-alaska-jump-master-takes-a-breath-after-supporting-japan-ground-self-defense-force-soldiers-jumping-from-a-us-air-force-c-130j-super-hercules-assigned-to-the-36th-airlift-squadron-over-hiju-dai-drop-zone-oita-prefecture-japan-nov-4-2018-during-keen-sword-19-approximately-280-jgsdf-personnel-conducted-jump-training-from-us-air-force-c-130j-super-hercules-for-the-first-time-in-japan-R2RPYB.jpg)