Then-Lt. Col. Darren Jump, left, counsel for environmental and land use with the Office of Counsel for the Commandant, walks alongside a desk being moved into an office in the E Ring at the Pentagon in Arlington, Virginia, in an undated photo from 2002. Jump was one of the first Marines who returned to offices in the E Ring after that part of the Pentagon was renovated following the attacks on 9/11. - Then-Lt. Col. Darren Jump, left, counsel for environmental and land use with the Office of Counsel for the Commandant, walks alongside a desk being moved into an office in the E Ring at the Pentagon in Arlington, Virginia, in an undated photo from 2002. Jump was one of the first Marines who returned to offices in the E Ring after that part of the Pentagon was renovated following the attacks on 9/11.

U.S. Marines run up stairs during a stair walk at the San Diego Convention Center, San Diego, Sept. 11. - U.S. Marines run up stairs during a stair walk at the San Diego Convention Center, San Diego, Sept. 11.

Oshana also explained why he decided to become an infantry first sergeant. - U.S. Marine 1st Sgt. Gilbert G. Oshana, Baker Company, 1st Marine Battalion, 7th Marine Regiment recounted why he believes in this country and the Marine Corps. Oshana also explained why he decided to become an infantry first sergeant.

Marines with Special Purpose Marine Air Ground Task Force – Nashville salute during a 9/11 Remembrance Ceremony in Nashville, Tenn., Sept. 11, 2016. Marine Week Nashville is a chance to reconnect with our Marines, sailors, veterans and their families from different generations. - Marines with Special Purpose Marine Air Ground Task Force – Nashville salute during a 9/11 Remembrance Ceremony in Nashville, Tenn., Sept. 11, 2016. Marine Week Nashville is a chance to reconnect with our Marines, sailors, veterans and their families from different generations.

A color guard from Brooklyn’s 6th Communication Battalion retires the colors during a remembrance ceremony for two Reserve Marines from their unit at Floyd Bennett Field, Aug. 30, 2016. Sgt. Maj. Michael S. Curtin and Gunnery Sgt. Matthew D. Garvey, first responders with the city’s police fire departments, lost their lives at the World Trade Center on 9/11. To honor their memory, Marine Corps Reserve Center Brooklyn dedicated the Curtin Garvey Complex and a 9/11 monument made partially with steel from the World Trade Center. The remembrance ceremony is being held in conjunction with the U.S. Marine Corps Reserve Centennial, celebrating 100 years of service and selfless dedication to the nation. - A color guard from Brooklyn’s 6th Communication Battalion retires the colors during a remembrance ceremony for two Reserve Marines from their unit at Floyd Bennett Field, Aug. 30, 2016. Sgt. Maj. Michael S. Curtin and Gunnery Sgt. Matthew D. Garvey, first responders with the city’s police fire departments, lost their lives at the World Trade Center on 9/11. To honor their memory, Marine Corps Reserve Center Brooklyn dedicated the Curtin Garvey Complex and a 9/11 monument made partially with steel from the World Trade Center. The remembrance ceremony is being held in conjunction with the U.S. Marine Corps Reserve Centennial, celebrating 100 years of service and selfless dedication to the nation.

Marines with Special-Purpose Marine Air-Ground Task Force Crisis Response-Africa bow their heads in prayer during a September 11th remembrance ceremony in Nissoria, Italy, Sept. 22, 2015. The local priest offered a prayer as Americans and Nissorians remembered the shared pain of the lives lost that day 14 years ago. - Marines with Special-Purpose Marine Air-Ground Task Force Crisis Response-Africa bow their heads in prayer during a September 11th remembrance ceremony in Nissoria, Italy, Sept. 22, 2015. The local priest offered a prayer as Americans and Nissorians remembered the shared pain of the lives lost that day 14 years ago.

Benin National Surveillance Police commemorated the Sept. 11, 2001, anniversary attacks with U.S. Marines and sailors at the National Police Academy in Cotonou, Benin, today. The Marines and sailors with Special-Purpose Marine Air-Ground Task Force Crisis Response-Africa are in Benin for a month-long training mission with the National Surveillance Police to help counter illicit trafficking along the country’s borders. During a break in the training, NPS students stood alongside Marines and sailors in formation for a brief ceremony to remember the day when more than 3,000 lives perished from the heinous terrorist attack. The ceremony began with the playing of taps, followed by three smoke cans, releasing colors of the Benin flag, symbolizing the partnership between the U.S. and Benin. - Benin National Surveillance Police commemorated the Sept. 11, 2001, anniversary attacks with U.S. Marines and sailors at the National Police Academy in Cotonou, Benin, today. The Marines and sailors with Special-Purpose Marine Air-Ground Task Force Crisis Response-Africa are in Benin for a month-long training mission with the National Surveillance Police to help counter illicit trafficking along the country’s borders. During a break in the training, NPS students stood alongside Marines and sailors in formation for a brief ceremony to remember the day when more than 3,000 lives perished from the heinous terrorist attack. The ceremony began with the playing of taps, followed by three smoke cans, releasing colors of the Benin flag, symbolizing the partnership between the U.S. and Benin.

Members of the Joint Chiefs of staff applaud for the conclusion of the signing of the "28-star" Letter at the Pentagon, Feb. 2, 2015. The letter challenges transitioning service members to continue serving their community and encouraged greater involvement between veterans and the public. (U.S. Marine Corps photo by Lance Cpl. Remington Hall/released) - Members of the Joint Chiefs of staff applaud for the conclusion of the signing of the "32-star" Letter at the Pentagon, Feb. 2, 2015. The letter challenges transitioning service members to continue serving their community and encouraged greater involvement between veterans and the public. (U.S. Marine Corps photo by Lance Cpl. Remington Hall/released)

The Quantico Marine Band performs the “National Anthem” at Yankee Stadium Sept. 11, 2014, at New York City. The band traveled to the city to perform and pay their respects to the people who lost their lives 13 years ago during the 9/11 attacks on the World Trade Center. - The Quantico Marine Band performs the “National Anthem” at Yankee Stadium Sept. 11, 2014, at New York City. The band traveled to the city to perform and pay their respects to the people who lost their lives 13 years ago during the 9/11 attacks on the World Trade Center.

Marines, sailors and coalition partners with Regional Command (Southwest) bow their heads during a moment of silence at the 9/11 memorial ceremony aboard Camp Leatherneck, Afghanistan, Sept. 11, 2014. “That moment of silence gave us an opportunity to reflect and reminds us of why we are here today in Afghanistan in Helmand province,” said Brig. Gen. Daniel D. Yoo, commander, RC(SW) and Marine Expeditionary Brigade – Afghanistan. - Marines, sailors and coalition partners with Regional Command (Southwest) bow their heads during a moment of silence at the 9/11 memorial ceremony aboard Camp Leatherneck, Afghanistan, Sept. 11, 2014. “That moment of silence gave us an opportunity to reflect and reminds us of why we are here today in Afghanistan in Helmand province,” said Brig. Gen. Daniel D. Yoo, commander, RC(SW) and Marine Expeditionary Brigade – Afghanistan.