In Photos: America Celebrates Independence Day

Passengers gather near the departures board at Penn Station, July 1, 2016 in New York City. Officials from the American Automobile Association (AAA) are predicting 44 million people will travel by roads, airports, buses, and train this holiday weekend.

People row boats in Central Park on July 3, 2016 in New York City. The New York area experienced warm, summer weather for the holiday weekend.

A worker returns shopping carts outside of the Fireworks Supermarket store in Lenoir City, Tennessee.

A marching band performs at the 112th Annual Huntington Beach 4th of July Parade on July 4, 2016 in Huntington Beach, California.

A reenactor walks behind American flags during Fourth of July festivities at Georg Washington's Mount Vernon on Monday July 04, 2016 in Mount Vernon, VA.

The Kensongton, Maryland's patriotic themed bike parade led by a Kensington Volunteer Fire Department truck, where hundreds of locals took part in the 21st Annual Fourth of July Bike Parade through the streets of Kensington.

People wait under the rain before the 40th annual Macy's 4th of July fireworks in New York City, on July 04, 2016. 4th of July celebrations mark the United States' 240th Independence Day.

A parade attendee carries a flag at the 112th Annual Huntington Beach 4th of July Parade on July 4, 2016 in Huntington Beach, California.

A patriotic horse is led through the seventh annual Park Hill Fourth of July Parade in Colorado on July 4, 2016.

A woman on the Miss Colorado float waves to parade watchers during the seventh annual Park Hill Fourth of July Parade on July 4, 2016.

Contest MC George Shea hefts tray of hot dogs in buns in preparation of Nathan's Famous centennial contest in Coney Island, Brooklyn, New York.

Cyclists ride past a lit up Santa Monica pier in Santa Monica, California on June 30, 2016, as a Summer night falls on the last day of June ahead of the Fourth of July 4th holiday weekend across America.

A crowd gathers to watch fireworks from POV at W Washington, DC Hotel during the annual Fourth of July celebration on Monday July 04, 2016 in Washington, DC.

Fireworks illuminate the sky over Navy Pier shores of Lake Michigan during 4th of July celebrations in Chicago on July 04, 2016.

Fireworks set off from the Canadian side light up the sky over Niagara Falls late July 3, 2016, part of the July 4th Independence Day celebrations, in Niagara Falls, New York

Fourth of July fireworks explode over the City and County building during the Fourth of July celebrations at Civic Center Park on July 3, 2016 in Denver, Colorado.

A girl cheers as confetti falls as the end of the Independence Day celebrations near the Edward A. Hatch Memorial Shell along the Charles River Esplanade in Boston on July 4, 2016.