South Korean and U.S. soldiers cross a river using a pontoon bridge as they conduct a river-crossing drill in the South Korean border town of Yeoncheon, north of Seoul, on March 20, 2025.

A K1E1 tank of South Korea crosses a river using a pontoon bridge as South Korean and U.S. soldiers conduct a river-crossing drill in the South Korean border town of Yeoncheon, north of Seoul ...