The annual production of food grains had dropped in Bihar from 7.5 million tonnes in 1965–66 to 7.2 million tonnes in 1966–1967 during the Bihar drought. There was an even sharper drop in 1966–67 to 4.3 million tonnes. The national grain production dropped from 89.4 million tonnes in 1964–65 to 72.3 in 1965–66 — a 19% drop. The rise in prices of food grains caused migration and starvation, but the public distribution system, relief measures by the government, and voluntary organizations limited the impact. On a number of occasions, the Indian-government sought food and grain from the United States to provide replacement for damaged crops, however US food aid was limited by Lyndon B. Johnson in retaliation for Indian criticism on the US's role in the Vietnam War. The government set up more than 20,000 fair-price stores to provide food at regulated prices for the poor or those with limited incomes. A large-scale drought in Bihar was adverted due to this import, although livestock and crops were destroyed. Other reasons for successfully averting a large-scale drought were employing various drought prevention measures such as improving communication abilities, issuing drought bulletins over the radio, and offering employment to those affected by drought in government public works projects.