-- Boy Scouts carry a large American flag through the Memphis National Cemetery in Tennessee, where scouts also placed flags on 42,000 graves. At Dover Air Force Base, the remains of fallen soldiers are returned to their families. In Afghanistan, the top U.S. commander reads a 23-year-old's letter to his family that he had prepared to be read in the event of his death.

"Today we remember his life and his words, for they speak resoundingly and timelessly for our fallen brothers and sisters in arms," said Marine Gen. John Allen, who also leads the NATO coalition in Afghanistan.

Across the world this weekend, Americans are honoring the fallen, veterans and military personnel in ceremonies and private remembrances.

Here's a gallery of AP photos from Memorial Day weekend.

Loading Slideshow...
  • President Barack Obama, and Maj. Gen. Michael S. Linnington, Commander of the U.S. Army Military District of Washington, lowers their heads during a wreath-laying ceremony at the Tomb of the Unknowns at Arlington National Cemetery on Memorial Day, Monday, May 28, 2012, in Arlington, Va. (AP Photo/Pablo Martinez Monsivais)

  • Ret. Air Force Maj. Alfred Nathaniel Simmons, from Baltimore, Md., lines up with other members of the Veterans of Foreign Wars honor guard at the Memorial Day Observance ahead of President Barack Obama's arrival at the Memorial Amphitheater at Arlington National Cemetery, Monday, May 28, 2012. (AP Photo/Charles Dharapak)

  • Gen. John Allen, center, the top U.S. commander in Afghanistan, salutes before he observes Memorial Day by reading a letter written by an American soldier to his family before he died earlier this year, at the ISAF headquarters in Kabul, Afghanistan, Monday, May 28, 2012. (AP Photo/Anja Niedringhaus)

  • A Marine salutes as motorcycles drive past during the annual Rolling Thunder parade ahead of Memorial Day in Washington, Sunday, May 27, 2012. (AP Photo/Charles Dharapak)

  • Cathy Ridge, of West Cobb, Ga., touches an American flag at the grave of her husband, retired U.S. Marine Gunnery Sgt. Charles Edward Ridge, Monday, May 28, 2012, at the Georgia National Cemetery in Canton, Ga. (AP Photo/David Goldman)

  • A flag decorates a headstone at the Kentucky Veterans Cemetery West on Friday, May 25, 2012, in Hopkinsville, Ky. (AP Photo/Mark Humphrey)

  • World War II veteran Jesse R. Turner embraces Helen Marie Misel at a display of over more than 1700 United States flags in Shawnee, Kan., Saturday, May 26, 2012. Turner served in the Army Air Corps. (AP Photo/Orlin Wagner)

  • Madeline Grace Wallace, 4, carries flags at the National Cemetery in Little Rock, Ark., Friday, May 25, 2012. The girl and her mother visited the cemetery to place flags on graves for Memorial Day. (AP Photo/Danny Johnston)

  • Madeline Grace Wallace, 4, daughter of U.S. Air Force Tech Sgt. Wendy Wallace, picks up flags to take to her mother to place on graves for Memorial Day at National Cemetery in Little Rock, Ark., Friday, May 25, 2012. (AP Photo/Danny Johnston)

  • Volunteer Red Flegal of New London, Pa., helps a visitor with a rubbing of a name on the Vietnam Veteran's Memorial in Washington, Friday, May 25, 2012. (AP Photo/Susan Walsh)

  • Carrying small American flags, Boy Scouts Austin Moore, right and Bryant Conquest, look for any grave markers without a flag in the Vicksburg National Cemetery in Vicksburg, Miss., Friday, May 25, 2012. (AP Photo/Rogelio V. Solis)

  • Andrew Lewis, right, and Devon Martell, center, both from Smithsburg, Md., look at the Vietnam Veteran's Memorial in Washington, Friday, May 25, 2012. (AP Photo/Susan Walsh)

  • U.S. Air Force Tech Sgt. Wendy Wallace and her daughter Madeline Grace, 4, place flags at National Cemetery in Little Rock, Ark., Friday, May 25, 2012. (AP Photo/Danny Johnston)

  • People sit in lawn chairs among the graves of military personnel and their families during Memorial Day ceremonies at Brig. General William C. Doyle Veterans Memorial Cemetery in Wrightstown N.J., Saturday, May 26, 2012. (AP Photo/Mel Evans)

  • Donald Stewart, of Somerset, N.J., stands next to his wife, Betty Stewart, at the grave of her son, U.S. Navy veteran Twain S. Bryant, during Memorial Day ceremonies at Brig. General William C. Doyle Veterans Memorial Cemetery in Wrightstown N.J., Saturday, May 26, 2012. (AP Photo/Mel Evans)

  • An honor guard stands near wreaths honoring the fallen during Memorial Day ceremonies at Brig. General William C. Doyle Veterans Memorial Cemetery in Wrightstown N.J., Saturday, May 26, 2012. (AP Photo/Mel Evans)

  • Military veteran Gerald Williams, right, of Willingboro,N.J., salutes with others during Memorial day ceremonies at Brig. General William C. Doyle Veterans Memorial Cemetery in Wrightstown N.J., Saturday, May 26, 2012. (AP Photo/Mel Evans)

  • A woman stands among flags at graves of military personnel and their families before Memorial Day ceremonies at Brig. General William C. Doyle Veterans Memorial Cemetery in Wrightstown N.J., Saturday, May 26, 2012. (AP Photo/Mel Evans)

  • Evalynn Israel, 9, of Palmdale, Calif., walks through the Arlington West Iraq War memorial in Santa Monica, Calif., Saturday, May 26, 2012. (AP Photo/Jae C. Hong)

  • Theressa Threet, right, places a flag on a veteran's grave at Mount Holly Cemetery in Little Rock, Ark., as Carolynn Coleman, left, and Angelynn Hardastle, right, check a list Sunday, May 27, 2012. (AP Photo/Danny Johnston)

Related on HuffPost: