Sunday's test was detected by the U.S.-developed THAAD anti-missile system, despite much controversy surrounding its installation last month.
Moon Jae-in has set out his plan to ease tensions on the Korean peninsula.
The two leaders agreed to work toward peace on the Korean peninsula.
The election of Moon Jae-in, a dovish leader in South Korea, could complicate Donald Trump’s plans to stop North Korea’s nuclear weapons programs.
According to polls, liberal Moon Jae-in is likely to sweep to victory.
South Korea's probable new president is set to shake up the status quo in relations with North Korea and the United States.
North Korea's state-run media outlet called on South Koreans to 'wage unflinching struggle' against the U.S.'s missile defense system.
Seoul now has an “early capability” to defend against North Korea's nuclear missile threat.
Trump's national security adviser, H.R. McMaster, reassured his South Korean counterpart, Kim Kwan-jin, that the U.S. alliance with South Korea was its top priority in the Asia-Pacific region.
President Donald Trump blasted the 'horrible' trade deal between the U.S. and South Korea, threatening to "terminate" it if Seoul didn't pay for the billion-dollar THAAD.
North Korea remained defiant and vowed to continue with nuclear and missile tests.
Two Navy destroyers of the Carl Vinson Carrier Strike Group drilled with South Korea and Japan Tuesday as North Korea held artillery tests to mark the founding of its army.
Many South Koreans support President Donald Trump's firm approach to North Korea, but have expressed frustration over his administration's public errors.
Seoul has said it will not let its guard down and is watching the situation closely.
Pence and Abe agreed that they needed to persuade China to play a larger role in dealing with North Korea.
China pleaded for peace as heightened tensions in the Asia-Pacific made a military showdown between nuclear-armed North Korea and the U.S. appear more likely.
Park was arrested over allegations that she colluded with a friend to pressure big businesses to contribute to now-defunct foundations set up to back her policy initiatives.