The Tribute in Light installation is illuminated over lower Manhattan as seen from The National September 11 Memorial & Museum marking the 17th anniversary of the 9/11 attacks in New York City, U.S., September 11, 2018. (Photo by Andrew Kelly/Reuters)





This undated image provided by The Kroger Co. shows an autonomous vehicle called the R1. Kroger will begin testing grocery deliveries using driverless cars outside of Phoenix. The grocery chain said the project will begin Thursday, August 16, 2018, in Scottsdale, at a Fry's supermarket, which is owned by Kroger. The Toyota Prius will be used for the deliveries, manned by a human to monitor its performance. During phase two in the fall deliveries will be made by the R1 with no human aboard. (Photo by The Kroger Co. via AP Photo)





Miss Massachusetts Gabriela Taveras introduces herself at the start of the third and final night of preliminary competition at the Miss America competition in Atlantic City N.J. on Friday September 7, 2018. (Photo by Wayne Parry/AP Photo)





Revelers at dawn participate in J'Ouvert, an overnight celebration the night before the West Indies Day Parade in Brooklyn, NY on September 3, 2018. Violence in past years led NYPD to shut down the parade route until 2am. (Photo by Stephen Yang)





Revelers at dawn participate in J'Ouvert, an overnight celebration the night before the West Indies Day Parade in Brooklyn, NY on September 3, 2018. (Photo by Stephen Yang)





Revelers participate in J'Ouvert, an overnight celebration the night before the West Indies Day Parade in Brooklyn, NY on September 3, 2018. (Photo by Stephen Yang)





Revelers participate in J'Ouvert, an overnight celebration the night before the West Indies Day Parade in Brooklyn, NY on September 3, 2018. (Photo by Stephen Yang)





Revelers at dawn participate in J'Ouvert, an overnight celebration the night before the West Indies Day Parade in Brooklyn, NY on September 3, 2018. (Photo by Stephen Yang)





Models gather backstage for the Runway of Dreams runway show, Wednesday, September 5, 2018, during Fashion Week in New York. The runway show featured models with disabilities wearing adaptive clothing for children and adults. (Photo by Kevin Hagen/AP Photo)





The Runway of Dreams collection is modeled Wednesday, September 5, 2018, during Fashion Week in New York. (Photo by Kevin Hagen/AP Photo)





The Runway of Dreams collection is modeled by Shaholly Ayers, Wednesday, September 5, 2018, during Fashion Week in New York. (Photo by Kevin Hagen/AP Photo)





John Cunningham, left, and Hunter Shows, right, watch the waves crash from Tropical Storm Gordon on Tuesday, September 4, 2018, in Dauphin Island, Ala. (Photo by Dan Anderson/AP Photo)





A car drives through a road as it slowly begins to flood as Tropical Storm Gordon approaches on Tuesday, September 4, 2018, in Dauphin Island, Ala. (Photo by Dan Anderson/AP Photo)





Jaycee Sotello fills her truck up with gas as Hurricane Lane approaches Honolulu, Hawaii, U.S. August 21, 2018. (Photo by Hugh Gentry/Reuters)





Fans at Memorial Stadium dance to music during a lightning and rain delay in the first half of an NCAA college football game between Nebraska and Akron in Lincoln, Neb., Saturday, September 1, 2018. (Photo by Nati Harnik/AP Photo)





Trader Michael Milano works on the floor of the New York Stock Exchange, Wednesday, August 22, 2018. Stocks are off to a mixed start on Wall Street as the U.S. market is poised to reach its longest-ever bull run. (Photo by Richard Drew/AP Photo)





People react to a swarm of bees in Times Square in New York City, U.S., August 28, 2018. (Photo by Brendan McDermid/Reuters)





People are evacuated as Los Angeles County Sheriff's deputies prepare to stand guard at Kaiser Permanente Downey Medical Center, following reports of someone with a weapon at the facility in Downey, Calif., Tuesday, September 11, 2018. Los Angeles County sheriff's officials say a suspect is in custody and deputies and police officers are methodically searching the complex. (Photo by Jae C. Hong/AP Photo)





In this November 7, 2017 file photo a surfer walks out of the surf as the sun sets behind Ocean Beach pier in San Diego. California Gov. Jerry Brown announced Monday, August 20, 2018 that he signed a bill making surfing the official state sport. (Photo by Gregory Bull/AP Photo)





New Orleans Saints Saintsations Jesse Hernandez performs during the second half against the Tampa Bay Buccaneers at the Mercedes-Benz Superdome on September 9, 2018 in New Orleans, Louisiana. (Photo by Jonathan Bachman/Getty Images)





D.C. United fans Sidny Oyola and Yvette Jimenez are showered with beer as fans celebrate the team’s goal against the New England Revolution at Audi Field in Washington on August 19, 2018. (Photo by Katherine Frey/The Washington Post)





In this Sunday, August 12, 2018 photo provided by the National Park Service, people walk along the shore near Lake McDonald Lodge as the Howe Ridge Fire burns in Glacier National Park, Mont. A wildfire destroyed structures and forced evacuations Monday from the busiest area of Montana's Glacier National Park, as officials in California prepared to reopen Yosemite National Park Tuesday following a nearly three-week closure at the height of the summer season. (Photo by National Park Service via AP Photo)





Cassie Semyon, 21, an intern for NBC News, runs from the courthouse with results outside of federal court as jury deliberations are announced in the trial of the former Donald Trump campaign chairman Paul Manafort in Alexandria, Va., Tuesday, August 21, 2018. (Photo by Jacquelyn Martin/AP Photo)





A boy participates in mutton bustin' as he rides a sheep at the Snowmass Rodeo on August 22, 2018, in Snowmass, Colorado. The Snowmass rodeo is on its 45th year, making it one of the longest running rodeos in Colorado. (Photo by Alex Edelman/AFP Photo)





A stadium security guard stands with her hand over her heart as Denver Broncos linebacker Brandon Marshall (54) and wide receiver Demaryius Thomas (88) sit in silent protest during the national anthem prior to the game against the Arizona Cardinals during a pre season game at University of Phoenix Stadium in Glendale, AZ, USA on August 30, 2018. (Photo by Mark J. Rebilas/USA TODAY Sports via Reuters)





A participant on stilts takes part in the West Indian American Day Parade in the Brooklyn borough of New York, Monday, September 3, 2018. New York's Caribbean community has held annual Carnival celebrations since the 1920s, first in Harlem and then in Brooklyn, where festivities happen on Labor Day. (Photo by Craig Ruttle/AP Photo)