With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: A major concern for Kissinger was the possibility of Soviet influence in the Persian Gulf. In April 1969, Iraq came into conflict with Iran when Shah Mohammad Reza Pahlavi renounced the 1937 treaty governing the Shatt-al-Arab river. After two years of skirmishes along the border, President Ahmed Hassan al-Bakr broke off diplomatic relations with Iran on December 1, 1971. In May 1972, Nixon and Kissinger visited Tehran to tell the Shah that there would be no "second-guessing of his requests" to buy American weapons. At the same time, Nixon and Kissinger agreed a plan of the Shah's that the United States together with Iran and Israel would support the Kurdish "peshmerga" guerrillas fighting for independence from Iraq. Kissinger later wrote that despite Vietnam, there was certain possibility of deploying American forces in the Middle East, and meanwhile Iran was to act as America's surrogate in the Persian Gulf. Kissinger described the Baathist regime in Iraq as a potential threat to the United States and believed that building up Iran and supporting the "peshmerga" was the best counterweight.
text_B: Would Kissinger's strategy in the Middle East have affected American troops directly?
YES.