The United States recorded its 12th million COVID-19 case on Saturday, even as millions of Americans were expected to travel for the upcoming Thanksgiving holiday, ignoring warnings from health officials about furthering the spread of the infectious disease.<br /><br />More than 1 million people flew through U.S. airports on Friday, according to data from the Transportation Security Administration, fueling fears of even greater spread of the virus. It was the second-heaviest domestic air traffic day since the start of the pandemic, despite pleas from health officials for Americans to stay home.