This is the deadliest year in U.S. history, with deaths topping 3 million for the first time. It's due mainly to the coronavirus pandemic that has killed nearly 320,000 Americans, and counting.

By Mike Stobbe, Associated Press

Medical researchers have created the first genetic map of colon and breast cancer, revealing that nearly 200 mutated genes that were previously unknown help tumors grow and spread. Meanwhile, breast cancer rates in the United States have started to fall.