Graduating students place messages and artwork on the top of their caps as they attend their graduating ceremony at UC San Diego in San Diego, California, U.S. June 17, 2017. (Photo by Mike Blake/Reuters)





Christian Jacobs waits in the rain for President Donald Trump at the Fourth of July picnic for military families on the South Lawn of the White House, Tuesday, July 4, 2017, in Washington. (Photo by Alex Brandon/AP Photo)





A man competes in the tractor balance bridge competition with an antique tractor at the Vigo County Fair in Terre Haute, Ind., Sunday, July 9. 2017. (Photo by Austen Leake/The Tribune-Star via AP Photo)





Jakai Tunstall, 6, passes through a cascade of water as children play in the fountains at The Yards Park as a heat wave passes through the DC area on Tuesday, July 11, 2017, in Washington, DC. Today's heat was kept in check by overcast clouds for much of the day, but the temperatures are expected to rise as we move into the week. (Photo by Jahi Chikwendiu/The Washington Post)





Jordyn Siemens, left, Halle Jones, and Hayley Sanchez, get excited when their school is called out during the May 12, 2017 University of Colorado Commencement on Friday. (Photo by Cliff Grassmick/Staff Photographer)





In this October 1, 2016 photo, visitors at the Albuquerque International Balloon Fiesta in Albuquerque, N.M. watch as balloons launch. New Mexico Gov. Susana Martinez unveiled “record-breaking” state tourism figures at the Albuquerque International Balloon Museum on Wednesday, July 5, 2017. (Photo by Russell Contreras/AP Photo)





A PATH train packed with commuters is ready for departure from the PATH station in Hoboken Terminal, Monday, July 10, 2017, in Hoboken, N.J. Amtrak began extensive repairs Monday to tracks and signals in Penn Station, affecting several hundred thousand commuters on the Long Island Rail Road and New Jersey Transit. Fewer trains during peak periods means a more crowded commute, even on alternative routes like the PATH train. (Photo by Andres Kudacki/AP Photo)





Morning sunlight casts shadows on a mural as a pedestrian uses the sidewalk in downtown Mebane, N.C., Wednesday, June 14, 2017. (Photo by Gerry Broome/AP Photo)





A U.S. Park Police helicopter flies past the rising full moon as it banks over the National Mall in Washington, Saturday evening, July 8, 2017. (Photo by J. David Ake/AP Photo)





Fans wait in line during the D23 expo fan convention at the Convention Center in Anaheim, California, on July 16, 2017. (Photo by Mark Ralston/AFP Photo)





People participate in a yoga class during an annual Solstice event in the Times Square district of New York, U.S., June 21, 2017. (Photo by Lucas Jackson/Reuters)





A girl leaps into the air while watching a fireworks display, in celebration of the upcoming July 4 Independence Day, at Tod's Point in Greenwich, Connecticut, U.S. July 1, 2017. (Photo by Adrees Latif/Reuters)





Amtrak track workers work inside the tunnel at New York's Penn Station, the nation's busiest train hub, which will be closing tracks for repairs causing massive disruptions to commuters in New York City, U.S. July 7, 2017. (Photo by Brendan McDermid/Reuters)





A model walks down the runway during “IIFA Stomp” fashion show in Times Square in New York, U.S., July 13, 2017. (Photo by Bria Webb/Reuters)





Firefighters from a Burbank engine company take a break after working all night tackling the Whittier Fire near Santa Barbara, California, U.S. in this July 15, 2017 handout photo. (Photo by Mike Eliason/Reuters/Santa Barbara County Fire Department)





Visitors view an architectural waterfall detail from behind glass while visiting the National Gallery of Art on Wednesday July 05, 2017 in Washington, DC. (Photo by Matt McClain/The Washington Post)





A St. Louis police officer looks over a large hole in 6th Street, Thursday, June 29, 2017, in St. Louis, that swallowed a Toyota Camry between Olive and Locust Streets. It isn't immediately clear what caused the collapse. (Photo by Christian Gooden/St. Louis Post-Dispatch via AP Photo)





Members of the New York City Fire Department (FDNY) work at a Five alarm fire on 8th street and Broadway in New York, USA, 28 June 2017. According to reports, dozens of firefighters battled the fire. (Photo by Jason Szenes/EPA)





A commuter exits a closed off station after a subway train derailment, Tuesday, June 27, 2017, in the Harlem neighborhood of New York. A subway train derailed near a station in Harlem on Tuesday, frightening passengers and resulting in a power outage as people were evacuated from trains along the subway line. The Fire Department of New York said a handful of people were treated for minor injuries at around 10 a.m. It said there was smoke but no fire. Delays were reported throughout the subway system. (Photo by Mary Altaffer/AP Photo)





Xaviere Coleman pours water over his head to cool off in a Wookiee costume along the Las Vegas Strip, Tuesday, June 20, 2017, in Las Vegas. Coleman was taking a break from posing for photographs with tourists. The first day of summer is forecast to bring some of the worst heat the southwestern U.S. has seen in years. (Photo by John Locher/AP Photo)





Chaz Samuel, 6, of Virginia, whose mother is attending the National Governor's Association meeting, asks Providence mounted police office Dan Famigliette where the nearest park is that he and his brother can play in accompanied by their nanny during the first day of the National Governor's Association meeting Thursday, July 13, 2017, in Providence, R.I. Officer Famigliette and his Clydesdale “Charlie” are posted along the perimeter of the NGA meeting. (Photo by Stephan Savoia/AP Photo)





Retired Boston Red Sox designated hitter David Ortiz addresses a gathering, where part of Yawkey Way was renamed David Ortiz Drive, Thursday, June 22, 2017, outside Fenway Park in Boston. Ortiz's No. 34 will be retired in a ceremony prior to Friday night's game. (Photo by Charles Krupa/AP Photo)





Tributes to police officer Miosotis Familia are seen in front of the 46th Precinct in the Bronx borough of New York, Thursday, July 6, 2017. Familia was shot to death early Wednesday, ambushed inside her command post by an ex-convict, authorities said. He was later killed after pulling a gun on police. (Photo by Seth Wenig/AP Photo)





Dawn Russell gets arrested by Denver police officers after refusing the vacate the offices of Senator Cory Gardner on June 29, 2017 in Denver, Colorado. A handful of people, all of whom are with ADAPT, held a sit-in for 58 hours in the tiny front lobby space in the office of Colorado Senator Cory Gardner. They are asking the senator to vote against the new health care bill. As they were arrested protesters chanted “I would rather go to jail than die without Medicaid”. ADAPT is a national grass-roots community that organizes disability rights activists to engage in nonviolent direct action, including civil disobedience, to assure the civil and human rights of people with disabilities to live in freedom. (Photo by Helen H. Richardson/The Denver Post)





Two female police officers embrace as people march down 5th Ave. in the annual New York Gay Pride Parade, one of the oldest and largest in the world on June 25, 2017 in New York City. Thouands cheered as members of LGBT community danced and marched under a bright summer sun. Many participants carried political themed signs as President Trump's adminstration has angered some in the LGBT community. (Photo by Spencer Platt/Getty Images)





A wildfire burns homes in the Glenn Ilah area near Yarnell, Ariz. on Sunday, June 30, 2013. An Arizona fire chief says the wildfire that killed 19 members of his crew near the town was moving fast and fueled by hot, dry conditions. The fire started with a lightning strike on Friday and spread to 2,000 acres on Sunday amid triple-digit temperatures. (Photo by David Kadlubowski/AP Photo/The Arizona Republic)