I thought he ended the speech with “These proceedings are now closed.” Or something like that.
He went to a different microphone to give his broadcast speech after the surrender ceremony was closed and the Japanese delegation had departed.
...”These proceedings are now closed.” As the Japanese were led away, he put an arm around Halsey’s shoulders and said, “Bill, where the hell are those airplanes?” As if on signal, a cloud of planes—B-29s and Navy fighters—roared across the sky from the south. They joined, Kenney wrote, “in a long sweeping majestic turn as they disappeared toward the mists hiding the sacred mountain of Fujiyama.” In that instant, World War II ended. But MacArthur intended to speak the first words of the peace, too, and had spent most of the night working and reworking them in his spiky handwriting. Now he returned to the microphone for a broadcast to the American people...