A Ukrainian servicewoman fires a 2S7 Pion self-propelled gun at a position, as Russia's attack on Ukraine continues, on a frontline in Kherson region, Ukraine on November 9, 2022. (Photo by Viacheslav Ratynskyi/Reuters)

In the spring of 1965, within weeks of 3,500 American Marines arriving in Vietnam, a 39-year-old Briton named Larry Burrows began work on a feature for LIFE magazine, chronicling the day-to-day experience of U.S. troops on the ground – and in the air – in the midst of the rapidly widening war. The photographs in this gallery focus on a calamitous March 31, 1965, helicopter mission; Burrows’ “report from Da Nang”, featuring his pictures and his personal account of the harrowing operation, was published two weeks later as a now-famous cover story in the April 16, 1965, issue of LIFE.

Photo: Man your battle stations: The crew chief of helicopter Yankee Papa 13, lance corporal James C. Farley, mans an M-60 machine gun during a mission near Da Nang, Vietnam on March 31, 1965. (Photo by Larry Burrows/Time & Life Pictures)

The National September 11 Memorial & Museum (branded as 9/11 Memorial and 9/11 Memorial Museum) is the principal memorial and museum commemorating the September 11 attacks of 2001, which killed nearly 3,000 people, and the World Trade Center bombing of 1993, which killed six. The memorial is located at the World Trade Center site, on the former location of the Twin Towers, which were destroyed during the attacks. The World Trade Center Memorial Foundation was renamed the National September 11 Memorial & Museum at the World Trade Center in 2007.

A woman dressed as a nurse sits next to Gerhard after a coronavirus disease (COVID-19) vaccination in a brothel in Vienna, Austria on November 8, 2021. (Photo by Leonhard Foeger/Reuters)

A Ukranian soldier hugs his wife in the city of Irpin, north of Kyiv, on March 10, 2022. Russian forces on March 10, 2022 rolled their armoured vehicles up to the northeastern edge of Kyiv, edging closer in their attempts to encircle the Ukrainian capital. Kyiv's northwest suburbs such as Irpin and Bucha have been enduring shellfire and bombardments for more than a week, prompting a mass evacuation effort. (Photo by Aris Messinis/AFP Photo)

A model poses backstage ahead of the Romance Was Born show during Afterpay Australian Fashion Week 2022 Resort '23 Collections at Ken Done Gallery, The Rocks on May 09, 2022 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)

A woman rides her horse in the River Eden on Friday June 10, 2022, on Day 2 of the Appleby Horse Fair, the annual gathering of gypsies and travellers. (Photo by Owen Humphreys/PA Wire Press Association)

A dog plays amid a heavy snowfall in Madrid on January 9, 2021. Heavy snow fell across much of Spain, leaving huge areas blanketed in white as Storm Filomena brought wintry weather not seen in decades to the Iberian peninsula. (Photo by Benjamin Cremel/AFP Photo)