New York (CNN Business)Tyson Foods (TSN) is warning that "millions of pounds of meat" will disappear from the supply chain as the coronavirus pandemic pushes food processing plants to close, leading to product shortages in grocery stores across the country. "The food supply chain is breaking," wrote board chairman John Tyson in a full-page advertisement published Sunday in The New York Times, Washington Post and Arkansas Democrat-Gazette. US farmers don't have anywhere to sell their livestock, he said, adding that "millions of animals — chickens, pigs and cattle — will be depopulated because of the closure of our processing facilities."...