Harris ended her four-day tour of Asia by meeting with South Korean President Yoon Suk-yeol and reiterating America's commitment to defending South Korea should a war break out with its northern neighbors. Harris also visited the Demilitarized Zone separating the two countries, and spoke about the potential threats of North Korea's escalating weapons testing.
Per AP, some fear North Korea might soon conduct a nuclear test to garner the acknowledgment they seek.
In addition to the Thursday launch, North Korea also fired two short-range ballistic missiles on Wednesday, while Harris visited Japan, and one before she initially left the U.S. on Sunday.
South Korean officials have also detected evidence suggesting North Korea has plans to escalate its weapons demonstrations even further. For instance, officials suspect North Korea is preparing "to test a ballistic missile system designed to be fired from submarines," AP writes.