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Vice President Joe Biden meets with spectators as he marches in an Independence Day parade, Friday, July 4, 2014, at Independence Hall in Philadelphia. (AP Photo/Matt Rourke) ( Biden Fourth of July )

John Eifert of the Millville American Legion, left, hands out flags to people lining North State Street while riding in the annual Fourth of July P2arade in Millville, Pa., Friday, July 4, 2014. (AP Photo/Bloomsburg Press Enterprise, Jimmy May) ( Fourth of July )

Porkchop, a miniature pot-bellied pig, lines up to participate in the Fourth of July parade in Mebane, N.C., Friday, July 4, 2014. (AP Photo/The Times-News, Scott Muthersbaugh) ( Fourth of July )

A truck carrying members of the Veterans of Foreign Wars Post 4313 drives down the parade route during the Cordova Community Center's Independence Day celebration and parade in Cordova, Tenn. Friday, July 4, 2014. (AP Photo/The Commercial Appeal, William DeShazer) ( Fourth of July )

The USS Constitution fires a 21-gun salute off Castle Island on its annual turn around on Boston Harbor in Boston, Friday, July 4, 2014. (AP Photo/Michael Dwyer) ( Fourth of July )

Boaters take part in the 31st annual Fourth of July Boat Parade, Friday, July 4, 2014, in Murrells Inlet, S.C. (AP Photo/The Sun News, Charles Slate) ( Fourth of July Boat Parade )

Amber Bernard, 4, rides in the annual Fourth of July parade in The Greens neighborhood Friday morning, July 04, 2014. This was the 13th year for the parade according to organizer Jean Goldstein who participated in similar July Fourth celebrations organized by her father when she was growing up in Akron, Ohio. "It's one of my favorite memories of all time," she said. (Lewis Geyer/Times-Call) ( 20140704_FOURTH_998 )

Eduardo Cotto, holds his daughter Sophia Cotto, 6, on his shoulders while listening to the musical sounds of Terry Lee Goffee, from The "Ultimate" Johnny Cash Tribute band during the Bay City Fireworks Festival at Wenonah Park, Thursday, July 3, 2014, in Bay City, Mich. (AP Photo/The Bay City Times, Amanda Ray) ( Fourth of July )

Greer Ransweiler, 7, pets Lyra during the annual Fourth of July celebration in Thompson Park Friday, July 04, 2014. (Lewis Geyer/Times-Call) ( 20140704_FOURTH_338 )

One participant tries to catch up to rest of the annual Fourth of July parade in The Greens neighborhood Friday morning, July 04, 2014. This was the 13th year for the parade according to organizer Jean Goldstein who participated in similar July Fourth celebrations organized by her father when she was growing up in Akron, Ohio. "It's one of my favorite memories of all time," she said. (Lewis Geyer/Times-Call) ( 20140704_FOURTH_039 )

Bobby King was the master of ceremonies for the annual Fourth of July celebration in Thompson Park Friday, July 04, 2014. (Lewis Geyer/Times-Call) ( 20140704_FOURTH_081 )

People participated during the annual Golf Cart Parade at Meadow Lake Senior Living Community in Tyler, Texas, Friday, July 4, 2014. (AP Photo/The Tyler Morning Telegraph, Sarah A. Miller) ( Fourth of July )

David Turner walks down Surf Avenue while wearing his American flag accessories after the Nathan's Famous Fourth of July International Hot Dog Eating contest at Coney Island, Friday, July 4, 2014, in New York. (AP Photo/John Minchillo) ( Hot Dog Contest )

John David Dowdle holds his 23-month-old Blakely Dowdle as she laughs while being sprayed with water by the Germantown Fire Department during the Poplar Estates Fourth of July parade in Germantown, Tenn., Friday, July 4, 2014. (AP Photo/The Commercial Appeal, Yalonda M. James) ( APTOPIX Fourth of July )

Recon, right, and Willow, wait to walk with their owners Steve and Cindy Yager, in the Delano Fourth of July parade in Delano, Minn., Friday, July 4, 2014. (AP Photo/Ann Heisenfelt) ( Fourth of July Parade )

Participants in the South Walton (County) Fourth of July Parade wave flags as they ride down County Road 30-A in Seaside, Florida on Friday, July 4, 2014. The annual Independence Day parade is an informal and quirky event that often includes many residents and visitors to the small Gulf Coast vacation community in Northwest Florida. (AP Photo/Northwest Florida Daily, Devon Ravine) ( Fourth Of July )

Alyssa Garza participates in the Oak Ridge Fourth of July parade Friday, July 4, 2014 in Oak Ridge, Texas. (AP Photo/ The Courier, Jason Fochtman) ( Fourth of July )

Members of Evans High School's JROTC present the colors during a ceremony honoring all three of Georgia's Signers of the Declaration of Independence and the final resting place of two of them on Friday, July 4, 2014, in Augusta, Ga. (AP Photo/The Augusta Chronicle, Todd Bennett) ( Fourth of July )

Coy Haraway, 81, of Cordova, films the Cordova Community Center's Independence Day Celebration and Parade in Cordova, Tenn. Friday, July 4, 2014. (AP Photo/The Commercial Appeal, William DeShazer) ( Fourth of July )

Seven-year-old Charlie Pedersen, right, plays red light/green light with dance studio friends before participating in the in the Delano Fourth of July parade in Delano, Minn., Friday, July 4, 2014. (AP Photo/Ann Heisenfelt) ( Fourth of July Parade )

Elasha Ramirez hands out American flags before the 65th annual Jaycees Independence Day parade, Friday, July 4, 2014, in Odessa, Texas. (AP Photo/The Odessa American, Courtney Sacco) ( Fourth of July )

Retired Marine Corps Sgt. John Peck, of Fredricksburg, Va., left, and Sophia Elwood, 7, the daughter of Peck's fiancee, pause beside the south reflecting pool at the 9/11 Memorial in New York, Friday, July 4, 2014, during an event honoring those that lost their lives on 9/11 and those who survived. Peck, who is a quadruple amputee as a result of an incident during his service in Afghanistan, was one of a group of severly injured servicemen who served in Afghanistan and/or Iraq who took part in the event. (AP Photo/Tina Fineberg) ( Fourth of July )

Jesse Hammonds a deputy with the Marshal's Office salutes during the playing of the national anthem during a ceremony honoring all three of Georgia's Signers of the Declaration of Independence and the final resting place of two of them on Friday, July 4, 2014, in Augusta, Ga. (AP Photo/The Augusta Chronicle, Todd Bennett) ( Fourth of July )

Shawna Buda, left, and Melissa Hurd, right, dance to the musical sounds of Terry Lee Goffee, from The "Ultimate" Johnny Cash Tribute band during the Bay City Fireworks Festival at Wenonah Park, Thursday, July 3, 2014, in Bay City, Mich. (AP Photo/The Bay City Times, Amanda Ray) ( Fourth of July )

The American flag and Texas state flag are carried during the 65th annual Jaycees Independence Day parade, Friday, July 4, 2014, in Odessa, Texas. (AP Photo/The Odessa American, Courtney Sacco) ( Fourth of July )