How did khrushchev respond to kennedys refusal to remove western powers from Berlin?

In response to Kennedy's refusal to remove Western powers from Berlin, Khrushchev escalated tensions by constructing the Berlin Wall in August 1961. This action effectively sealed off East Berlin from the West, demonstrating the Soviet Union's commitment to maintaining its influence in East Germany and deterring mass emigration. Khrushchev's response was aimed at solidifying the divide between East and West while also asserting Soviet strength in the Cold War context.