Task: Question Answering
Input (English): Passage: In June 1970, Nasser accepted the US-sponsored Rogers Plan, which called for an end to hostilities and an Israeli withdrawal from Egyptian territory, but it was rejected by Israel, the PLO, and most Arab states except Jordan. Nasser had initially rejected the plan, but conceded under pressure from the Soviet Union, which feared that escalating regional conflict could drag it into a war with the US. He also determined that a ceasefire could serve as a tactical step toward the strategic goal of recapturing the Suez Canal. Nasser forestalled any movement toward direct negotiations with Israel. In dozens of speeches and statements, Nasser posited the equation that any direct peace talks with Israel were tantamount to surrender. Following Nasser's acceptance, Israel agreed to a ceasefire and Nasser used the lull in fighting to move SAM missiles towards the canal zone. Question: Who pressured Nasser to accept the Rogers Plan?
Output (English): Soviet Union