At a large Communist Party conference in Beijing in January 1962, called the "Conference of the Seven Thousand", State Chairman Liu Shaoqi condemned the Great Leap Forward as responsible for widespread famine. The overwhelming majority of delegates expressed agreement, but Defense Minister Lin Biao staunchly defended Mao.
In January 1962, US Army General Edward Lansdale described plans to overthrow the Cuban government in a top-secret report (partially declassified 1989), addressed to Kennedy and officials involved with Operation Mongoose.
In June 1961, Karen was diagnosed with a malignant tumor of the middle part of her brain stem; X-ray treatment slowed its growth, but her health deteriorated to the point where she could no longer walk or talk. She died of pneumonia, related to her weakened health, on January 28, 1962, aged two.