U.S. Air Force Staff Sgt. Anna Melhado and Senior Airman Chelsea Shields, members of the Bagram Air Field Honor Guard, lower the flag during a Memorial Day retreat ceremony at Bagram Air Field, Afghanistan, May 25, 2015. Memorial Day is dedicated to remembering U.S. men and women who gave their lives while in military service protecting and defending national interests. (U.S. Air Force photo by Tech. Sgt. Joseph Swafford/Released)150525-N-XX999-069 NAVAL STATION ROTA, Spain (May 25, 2015) Flag detail members assigned to Commander, U.S. Naval Activities Spain, march out to the flagpole prior to a Memorial Day flag-raising ceremony. While raising the flag is a daily occurrence on most U.S. military installations around the world, NAVSTA Rota is positioned on a Spanish navy base and only permitted to raise the American flag after obtaining special permission. (U.S. Navy photo by Lt. David Carter /Released)Vickie Hunt sits next to the grave of her late husband, Vietnam veteran U.S. Marine Cpl. Timothy Hunt, at Georgia National Cemetery on Memorial Day, Monday, May 25, 2015, in Canton, Ga. "I come every Memorial Day," says Hunt. "As soon as I go through the gates here it brings me a sense of peace." (AP Photo/David Goldman)Spectators hold an American flag as sailors walk by during a Memorial Day parade in the Glenwood neighborhood of New York, Monday, May 25, 2015. President Barack Obama saluted Americans who died in battle Monday, noting the first Memorial Day in 14 years without U.S. forces involved in a major ground war. (AP Photo/Seth Wenig)Rocco Struncius salutes as soldiers walk by during a Memorial Day parade in the Glenwood neighborhood of New York, Monday, May 25, 2015. President Barack Obama saluted Americans who died in battle Monday, noting the first Memorial Day in 14 years without U.S. forces involved in a major ground war. (AP Photo/Seth Wenig)WASHINGTON, DC - MAY 24: General Martin E. Dempsey (C), Chairman, Joint Chiefs of Staff, and members of the Joint Chiefs of Staff on stage at the 26th National Memorial Day Concert on May 24, 2015 in Washington, DC. (Photo by Paul Morigi/Getty Images for Capitol Concerts)Boy Scouts watch as military aircraft from the World War II era fly over downtown Muskegon, Mich., Monday, May 25, 2015, to kick off the Memorial Day parade. (Andraya Croft/The Muskegon Chronicle via AP)American Legion Color Guard member Roy Guzman helps hold the American flag at the Brownsville Veterans Park, Monday, May 25, 2015, in Brownsville, Texas. A one mile silent march concluded at the park where there was a flag raising ceremony, 21-gun salute and speeches to celebrate Memorial Day. (Brad Doherty/The Brownsville Herald via AP)Christopher Lutz, member of the Mosley High School Marine Corps JROTC Color Guard, presents the colors during a Memorial Day Observance at Kent Forest Lawn Cemetery in Panama City, Fla. on Monday, May 25, 2015. (Andrew Wardlow/News Herald via AP)President Barack Obama speaks during a Memorial Day Observance at Arlington National Cemetery in Arlington, Va., Monday, May 25, 2015. Playing just below Obama in the Memorial Amphitheater are members of The President's Own, United States Marine Band. (AP Photo/Pablo Martinez Monsivais)A member of the U.S. Army's 3rd Infantry Regiment "The Old Guard" stands at attention during the arrival of President Barack Obama's motorcade at Arlington National Cemetery, Monday, May 25, 2015 in Arlington, Va., for Memorial Day ceremonies. (AP Photo/Pablo Martinez Monsivais)President Barack Obama bows his head during a benediction given by Chaplin Col. Gary R. Studniewski, left, at the Memorial Amphitheater at Arlington National Cemetery in Arlington, Va., Monday, May 25, 2015, during a Memorial Day ceremony. With Obama, from second from left are, Joint Chiefs Chairman Gen. Martin Dempsey, Defense Secretary Ash Carter and the president. (AP Photo/Pablo Martinez Monsivais)President Barack Obama greets former Senate Majority Leader Bob Dole, 91, after Obama spoke at a Memorial Day ceremony at Arlington National Cemetery in Arlington, Va., Monday May 25, 2015. (AP Photo/Jacquelyn Martin)Iraq War veteran, retired Pvt. Rocky Bishop is embraced by his daughter Cyndney, 6, while visiting the grave of his grandfather, Korean War veteran James Bishop, with his other daughter Hannah, 4, at Georgia National Cemetery, in honor of Memorial Day, Monday, May 25, 2015, in Canton, Ga. (AP Photo/David Goldman)Lucille Williams walks through Georgia National Cemetery while visiting the grave of her late husband, Korean War veteran Sgt. 1st Class Alvin Williams, in honor of Memorial Day, Monday, May 25, 2015, in Canton, Ga. (AP Photo/David Goldman)Sandra Bacchus of Coram, N.Y., second from right, and others, attends a Memorial Day ceremony at Arlington National Cemetery in Arlington, Va.,, Monday, May 25, 2015, with, from far left, her husband Michael Bacchus, and their grandsons Darren Marchong, 9, and Donovan Jones, 8. (AP Photo/Jacquelyn Martin)General John F. Campbell, commander of international forces in Afghanistan, speaks during a ceremony marking Memorial Day at the Resolute Support main headquarters in Kabul, Afghanistan, Monday, May 25, 2015. Over 2,300 American soldiers and more than 11,00 coalition soldiers have lost their lives in action during the last 14 years in Afghanistan. (AP Photo/Allauddin Khan)People wave as the Rolling Thunder annual motorcycle rally ride passes by during the annual Rolling Thunder parade ahead of Memorial Day in Washington, Sunday, May 24, 2015. (AP Photo/Jose Luis Magana)Participants in the Rolling Thunder annual motorcycle rally ride past Arlington memorial bridge during the parade ahead of Memorial Day in Washington, Sunday, May 24, 2015. (AP Photo/Jose Luis Magana)Motorcyclists ride during Rolling Thunder on May 24, 2015 in Washington, DC, as the US marks Memorial Day, May 25. The Rolling Thunder First Amendment Demonstration Run is an annual event to pay tribute to current and former US military members. AFP PHOTO/BRENDAN SMIALOWSKIA US Marine (R) salutes at a makeshift memorial for fallen soldiers during Rolling Thunder on May 24, 2015 in Washington, DC, as the US marks Memorial Day, May 25. The Rolling Thunder First Amendment Demonstration Run is an annual event to pay tribute to current and former US military members. AFP PHOTO/BRENDAN SMIALOWSKIJack Fliss with his dog "Bruiser" of San Antonio Texas pays tribute to a fellow soldier memorialized on the Vietnam Memorial Wall duringt The Rolling Thunder First Amendment Demonstration Run in Washington, DC, on May 24, 2015. The Rolling Thunder First Amendment Demonstration Run is an annual event to pay tribute to current and former US military members. AFP PHOTO / CHRIS KLEPONISWATERBURY, CT - MAY 24: Participants in the Waterbury Memorial Day Parade practice their flutes before marching on May 24, 2015 in Waterbury, Connecticut. Across America towns and cities will be celebrating veterans of the United States Armed Forces and the sacrifices they have made. Memorial Day is a federal holiday in America and has been celebrated since the end of the Civil War. (Photo by Spencer Platt/Getty Images)Dutch Prime Minister Mark Rutte (L) and U.S. ambassador to the Netherlands Timothy Broas (R) take part in a ceremoy xat the U.S. war cemetery in Margraten during Memorial Day in Margraten on May 24, 2015. AFP PHOTO/ANP MARTIJN BEEKMAN netherlands out (Photo credit should read Martijn Beekman/AFP/Getty Images)Military service members walk onto the pitch during a ceremony to honor members of the military during Memorial Day weekend before an MLS soccer match between the Seattle Sounders and Sporting Kansas City, Saturday, May 23, 2015, in Seattle. (AP Photo/Ted S. Warren)Members of Post 18 Stanford Ky. bow their heads during a prayer at the Danville Memorial Gardens in Danville, Ky. on Saturday, May 23, 2015 where U.S. flags are to be placed on each veteran's grave by the Boy Scouts of America. (Clay Jackson/The Advocate-Messenger via AP)A Cub Scout runs with an arm-full of flags as scouts placed thousands of flags on veterans graves at Brig. Gen. William C. Doyle Veterans Memorial Cemetery in honor of Memorial Day Friday, May 22, 2015, in Wrightstown, N.J. (AP Photo/Mel Evans)NEW YORK, NY - MAY 22: Sailors, in New York for Fleet Week, walk through lower Manhattan on May 22, 2015 in New York City. A parade of ships along the Hudson ushered in Fleet Week events on Wednesday, the 27th annual Fleet Week celebration. A Memorial Day commemoration ceremony is to include the unfurling of a 100-foot American flag, a wreath laying, a rifle salute and the playing of taps. (Photo by Spencer Platt/Getty Images)Horace Mann Magnet School student Skylar West places American flags at Little Rock National Cemetery in recognition of Memorial Day, Friday, May 22, 2015, in Little Rock, Ark. (AP Photo/Danny Johnston)Lincoln Elementary School students wave U.S. flags during a Memorial Day parade along Lake Boulevard in St. Joseph, Mich. on Friday, May 22, 2015. (AP Photo/The Herald-Palladium, Don Campbell)Volunteers raise an American Flag as they work to install a border of flags along the entrance and exit roads in the National Cemetery of the Alleghenies on Friday, May 22, 2015 in Bridgeville, Pa. Over 50 people helped place flagpoles and flags in preparation for the Memorial Day weekend. This is one of the 131 National Cemeteries maintained for veterans. (AP Photo/Keith Srakocic)Members of the 3rd US Infinity Regiment (The Old Guard) prepare to place American flags at the foot of graves in Arlington National Cemetery in Arlington, Virginia on May 21, 2015, during the annual "Flags In" ceremony for Memorial Day. AFP PHOTO/ JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)Members of the U.S. military and Atlanta Braves observe a moment of silence at a Memorial Day ceremony before the start of a baseball game between the Braves and the Milwaukee Brewers Saturday, May 23, 2015, in Atlanta. (AP Photo/David Goldman)