epa08838156 Travelers arrive to John F. Kennedy International airport in New York, New York, USA, 23 November 2020. The United States  Centers for Disease Control and Prevention (CDC) has issued a warning against Americans traveling for this week's Thanksgiving holiday, normally one of the busiest travel times of the year, in effort to control the spread of COVID-19. In spite of this warning, this weekend over a million passengers passed through airport security checkpoints for the first time since the beginning of the coronavirus pandemic and epidemiologists are concerned about a delayed spike in the national infections as a result of travel, which are already at record levels.  EPA/JUSTIN LANE