As a warning to North Korea, a US aircraft carrier docks in South Korea.

USS Ronald Reagan and ships from its accompanying strike force docked at a naval base in Busan . Arrival marks most significant deployment thus far in recent effort to maintain more US nuclear-capable forces in the area .

BUSAN, South Korea: Officials said a US aircraft carrier arrived in South Korea on Friday for the first time in about four years, preparing to join South Korean ships in a military show of force aimed at sending a message to North Korea.The USS Ronald Reagan and ships from its accompanying strike force docked at a naval base in Busan, a southern port city.Its arrival marks the most significant deployment thus far in a recent effort to maintain more US nuclear-capable strategic forces in the area to discourage North Korea.As a warning to North Korea, South Korea's president Yoon Suk-yeol has called for more joint exercises and other military power displays, citing a record number of missile tests earlier this year when negotiations failed to persuade it to end its nuclear weapons and missile program.

Former US military deployments and joint drills have been dismissed by North Korea as war rehearsals and proof of Washington's hostile policies.An American aircraft carrier has flown to South Korea for the first time since 2018.During diplomatic attempts to engage with North Korea in the same year, the allies cut back on some of their joint military activities, but those talks have now stalled, and Pyongyang unveiled an updated law this month clarifying that it has the right to conduct first-use nuclear attacks if necessary to defend itself.