Following the 2019 G20 Osaka summit, Trump arranged for a meeting with Chairman Kim at the Korean Demilitarized Zone alongside South Korean President Moon Jae-in. The one-day trilateral summit at the DMZ was held on June 30, in which Trump became the first U.S. president to set foot on North Korean soil while in office. Trump and Kim also pledged to jump-start negotiations over North Korea's nuclear program after talks collapsed during the February 2019 Hanoi summit. Subsequent October 2019 talks in Stockholm quickly broke down in recriminations, with the DPRK accusing the United States of a "hostile policy." There were no further known talks between the nations during the Trump presidency. By 2020, North Korea's nuclear arsenal had reportedly increased to levels far larger than it was prior to the 2018 Singapore summit.