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Relatives of Army Pvt. William Christman, who was the first military burial at the cemetery, James Christman, great-grand nephew, left, of Allentown, Pa., and Barbara Christman Page, great-grand niece, of Swiftwater, Pa., place a wreath at his grave marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. Christman, 20, enlisted in the 67th Pennsylvania Infantry and was hospitalized for measles five weeks later, dying on May 11, 1864 and buried at Arlington on May 13. (AP Photo) ( Arlington Cemetery Anniversary )

Jack Lechner, Deputy Superintendent of Arlington National Cemetery, center, and Army Command Sgt. David O. Turnbull, right, stand during the playing of "Taps" after a wreath was laid at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

A U.S. Army honor guard band member plays a drum roll during the playing of "Taps" at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

U.S. Army Reservist 1st Lt. William Garcia, seated, right, salutes as the honor guard arrives at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

U.S. Army honor guard arrive before the wreath laying at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

An Army honor guard bugler plays "Taps" after a wreath was laid at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

ARLINGTON, VA - MAY 13: Decendants participate in a wreath layinmg ceremony at the grave of Army Pvt. William Christman, as part of Arlington at 150 Celebration on May 13, 2014 in Washington, DC. P (Photo by Mark Wilson/Getty Images) ( 490088467 )

Jack Lechner, Administrator at Arlington National Cemetery lays a wreath at the grave of Army Pvt. William Christman, as part of Arlington at 150 Celebration on May 13, 2014 in Washington, DC. (Photo by Mark Wilson/Getty Images) ( 490088471 )

A US Military Honor Guard walks past the grave of Army Pvt. William Christman, after a wreath laying ceremony as part of Arlington at 150 Celebration on May 13, 2014 in Washington, DC. (Photo by Mark Wilson/Getty Images) ( 490088519 )

A U.S. Military bugler and drummer walk away from the grave of Army Pvt. William Christman, after a wreath laying ceremony as part of Arlington at 150 Celebration on May 13, 2014 in Washington, DC. (Photo by Mark Wilson/Getty Images) ( 490088521 )

Rows of gravestones lie near the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. AP Photo) ( Arlington Cemetery Anniversary )

James Christman, from Allentown, Pa., great-grand nephew of Army Pvt. William Christman, who was the first military burial at the cemetery, stands by his grave after wreaths were laid marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

U.S. Army honor guard members stand at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

Relatives of Army Pvt. William Christman, who was the first military burial at the cemetery, James Christman, great-grand nephew, center, his wife Kris, left, and daughter Lauren, second left, from Allentown, Pa., and Barbara Christman Page, great-grand niece, second from right, and her husband Donald Page, from Swiftwater, Pa., stand in front of his grave after they laid a wreath marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014, in Arlington, Va. (AP Photo) ( Arlington Cemetery Anniversary )

U.S. Army honor guard members stand near the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

A stone of remembrance sits on the gravestone of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. The stone is from the original Christman home that still stands in Pocono Lake, Pennsylvania. Christman, 20, enlisted in the 67th Pennsylvania Infantry and was hospitalized for measles five weeks later, dying on May 11, 1864 and buried at Arlington on May 13. (AP Photo) ( Arlington Cemetery Anniversary )

A stone of remembrance sits on the gravestone of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. The stone is from the original Christman home that still stands in Pocono Lake, Pennsylvania. (AP Photo) ( Arlington Cemetery Anniversary )

Jack Lechner, Deputy Superintendent of Arlington National Cemetery, lays a wreath at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

A U.S. Army honor guard arrives at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

A grave marker for an unknown soldier lies not far from the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

Army honor guard members arrive at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )

Wreaths from Arlington National Cemetery and the Historical Association of Tobyhanna Township, Pa., along with a stone of remembrance were placed at the gravesite of Army Pvt. William Christman, who was the first military burial at the cemetery, marking the beginning of commemorations of the 150th anniversary of Arlington National Cemetery in Arlington, Va., Tuesday, May 13, 2014. (AP Photo) ( Arlington Cemetery Anniversary )