U.S. President Joe Biden is expected to agree with his South Korean counterpart Yoon Suk Yeol on Wednesday to bolster extended deterrence measures in response to North Korea's growing nuclear threat.Biden and Yoon, who arrived in Washington on Monday for a state visit, will release a joint statement designed to reinforce U.S. security commitments, including shielding allies under its nuclear umbrella, according to senior U.S. administration officials.Another reason for agreeing on what they called the "Washington declaration" is to improve the clarity of what it means by extended deterrence…READ FULL ARTICLE