Memorial Day tempts Americans outdoors, raising virus fears

People walk past American flags flying at half-staff at the Washington Monument, Friday, May 22, 2020, in Washington. President Donald Trump ordered American flags to be flown at half-staff for a three-day period in remembrance of Americans who have lost their lives due to the coronavirus outbreak. (AP Photo/Patrick Semansky)

Stephen Wilmer, of Lindenhurst, N.Y., works at getting his kite aloft in the breeze as his daughter Emma adjusts her protective face mask as the family visited Jones Beach, in Wantagh, N.Y., Thursday. (AP Photo/Kathy Willens)

A rollerblader skates on the Broadwalk on Hollywood beach, Tuesday, May 19, 2020, in Hollywood, Fla. Broward County started a phased reopening Monday. (AP Photo/Wilfredo Lee)

Beachgoers relax on the shore at Good Harbor Beach in Gloucester, Mass., Friday. (AP Photo/Charles Krupa)

Millions of Americans are getting ready to emerge from coronavirus lockdowns and venture outdoors to celebrate Memorial Day weekend at beaches, cookouts and family outings, raising concern among public health officials that large gatherings could cause outbreaks to come roaring back.