The drill at Pocheon near the North Korean border involved 2,000 South Korean and US troops
South Korean K1A1 tanks participate in a joint live firing drill with the US at the Seungjin Fire Training Field in Pocheon, 65 km northeast of Seoul, on June 22. S.Korean and US troops held their biggest single-day joint live-fire exercise to test responses to any North Korean attack, amid high tensions on the peninsula.