After rejecting North Vietnam's peace plan in 1972, what did President Nixon do when North Vietnam demanded the plan be reinstated?

He launched Operation Linebacker. He bombed Hanoi and Haiphong that led to the destruction of the North’s economic and industrial centers. He continued the bombings and also threatened to withdraw U. S. and end the agreement. Nixon halted the bombings and signed the Paris Peace Accord that ended U. S. involvement in the area.