David Handschuh / NBC News
Marines are joined by New York City Firefighters and Police Officers in raising and lowering 25 American Flags on a pole on the roof of Engine 10 and Ladder 10 in the shadow of the World Trade Center on Sept 11, 2016..
AMEER ALHALBI / AFP - Getty Images
Syrian men carrying babies make their way through the rubble of destroyed buildings following a reported air strike on the rebel-held Salihin neighborhood of the northern city of Aleppo.
Molten lava sprays after a volcanic eruption from "The Peak of the Furnace" (Le Piton de la Fournaise) in the eastern side of the French Indian Ocean island of La Reunion.
RICHARD BOUHET / AFP - Getty Images
Police officers and explosive experts secure Central Police Station after an attack, in the coastal city of Mombasa, Kenya.
JOSEPH OKANGA / Reuters
SRDJAN ZIVULOVIC / Reuters
A dog jumps into the pool during the Flying Dogs competition in Kamnik, Slovenia.
MOHAMED NURELDIN ABDALLAH / Reuters
People ride on a bus as they return to their families ahead of the Eid al-Adha festival in Khartoum, Sudan.
Democratic presidential nominee Hillary Clinton waves as she leaves the home of her daughter Chelsea Clinton in New York City. Clinton left a September 11 Commemoration Ceremony early after feeling overheated and went to her daughter's house to rest.
Justin Sullivan / Getty Images
A vendor carries a sheep at a livestock market ahead of the Eid al-Adha festival, in Amman, Jordan.
MUHAMMAD HAMED / Reuters
An American flag stands amid names on the 9/11 memorial before the start of the 15th anniversary memorial service to 9/11 victims in New York.
JOHN TAGGART / EPA