Washington announces that the bombing of North Vietnam will continue until Hanoi agrees to negotiate "in a spirit of good will and in a constructive attitude."
North Vietnamese negotiators walked out of secret talks in Paris on December 13. President Nixon issued an ultimatum to North Vietnam to send its representatives back to the conference table within 72 hours "or else." They rejected Nixon's demand, and in response the president ordered Operation Linebacker II, a full-scale air campaign against the Hanoi area.
During the 11 days of the operation, 700 B-52 sorties and more than 1,000 fighter-bomber sorties dropped an estimated 20,000 tons of bombs, mostly over the densely populated area between Hanoi and Haiphong. In the course of the bombing, the Cuban, Egyptian, and Indian embassies were hit in Hanoi, as were Russian and Chinese freighters in Haiphong. Bach Mai, Hanoi's largest hospital, was also damaged by the attacks. In the United States, 41 American religious leaders issued a letter condemning the bombing.