The defense chiefs of South Korea and the United States held phone talks on their military cooperation on Thursday evening, local time.<br /> During the 30-minute phone conversation, Seoul's Defense Minister Song Young-moo congratulated his U.S. counterpart James Mattis on the successful North Korea-U.S. summit.<br />Song stressed President Moon's stance that a flexible change regarding military pressure on the North is necessary,... as long as faithful talks are ongoing.<br />They agreed to continue close consultations to implement the agreement at the North Korea-U.S. summit,... including detailed discussions on joint military exercises, particularly the upcoming Ulchi Freedom Guardian in August.<br /> Meanwhile,.. AFP reported Thursday, quoting an unnamed senior U.S. official,... that U.S. joint military drills with South Korea will be suspended indefinitely.<br />