Question: Casualties of War used a source from what Conde Nast magazine as its backing?

Context paragraphs:
Culture+Travel: Culture+Travel (formerly "Culture & Travel") is a travel magazine based in New York City, New York.  Published by Louise Blouin Media and founded by former Conde Nast editorial director James Truman, it was launched in 2006 as a bi-monthly print magazine.  It was later incorporated into art and lifestyle media "Artinfo.com", and relaunched as an online publication in 2014, providing original articles and travel destination guides.

Lisa Andersen: Lisa Andersen (born March 8, 1969, in Ormond Beach, Florida) is a four-time world surfing champion from the United States.  She won four successive world titles from 1994 to 1997.  She was named ASP's Rookie of the Year in 1987.  She was named as one of the 100 "Greatest Sportswomen of the Century" by Sports Illustrated for Women.  She was named the "1998 Female Athlete of the Year" by Conde Nast Sports for Women magazine.  She is a six-time winner of Surfer Magazine's Readers Poll.  In 2002, she was inducted into the Surfer's Hall of Fame.  In 2004, she was inducted into the Surfing Walk of Fame (located in Huntington Beach, California) as that year's Woman of the Year.

Stanley Stewart: Stanley Stewart FRSL is a writer.  He is the author of three travel books: "Old Serpent Nile", "Frontiers of Heaven" and "In the Empire of Genghis Khan" about journeys to the source of the Nile, through China to Xinjiang province, and across Mongolia by horse.  The last two books both won the Thomas Cook Travel Book Award, in 1996 and 2001 respectively, making Stewart the only writer, with Jonathan Raban, to have won this prestigious award twice.  He is a contributing editor at Conde Nast Traveller UK.  His work appears in various periodicals including the Sunday Times, the Daily Telegraph, and National Geographic Traveler, and has been included in numerous anthologies on both sides of the Atlantic.  In 2008 he was named the Magazine Writer of the year.  He was born in Ireland, grew up in Canada, and has spent most of his adult life in the UK.

Allure (magazine): Allure is an American women’s beauty magazine, published monthly by Conde Nast in New York City.  It was founded in 1991 by Linda Wells.  Michelle Lee replaced Wells in 2015.  A signature of the magazine is its annual Best of Beauty awards—accolades given in the October issue to beauty products deemed the best by magazine staff.

Lloyd Grove: Lloyd Bennett Grove (born February 6, 1955) is editor at large for "The Daily Beast", an American news reporting and opinion website focusing on politics and pop culture.  He is also a frequent contributor to "New York".  He was a gossip columnist for "New York Daily News" before he left on October 9, 2006, and wrote a fortnightly column for "Portfolio.com", the web site of "Conde Nast Portfolio Magazine", and was a contributing editor for "Portfolio Magazine" until it shut down in April 2009.

Dominique Browning: Dominique Browning is an American writer and editor.  From 1995 to 2007 she was the Editor-in-chief of the Conde Nast shelter publication "House & Garden".  Prior to "House & Garden" she worked at "Savvy", "American Photographer", "Esquire", "Newsweek", and "Mirabella".  As the Editor-in-chief of the re-launched "House & Garden", she introduced global environment issues to the magazines pages, and sought to search for the more meaningful ideals behind the hype-consumerism of Condé Nast publications typical of the time period, while the editorials of the issues she edited were, for her:

Marc Ian Barasch: Marc Ian Barasch (born 1949) is a non-fiction author, film and television writer-producer, magazine editor, and environmental activist.  Major books written by Barasch are "The Healing Path" (1992), "Remarkable Recovery" (1995), Healing Dreams (2001) and Field Notes on the Compassionate Life (2005).  He has been an editor-in-chief of New Age Journal (which won a National Magazine Award and a Washington Monthly Award for Investigative Journalism under his tenure);  and an editor at Psychology Today (where he was a finalist for the PEN Award); and Natural Health.  He has also done journalistic writing for Conde Nast publications on the arts and the environment.  He is Founder and Executive Director of the Green World Campaign (2006–present).

Cookie (magazine): Cookie was a lifestyle magazine for the modern mother published from 2005 until November 2009 by Condé Nast Publications.  According to Conde Nast, it featured "an editorial mix of fashion, home décor, travel, entertainment and health for her and her family."

Casualties of War: Casualties of War is a 1989 American war drama film directed by Brian De Palma, with a screenplay by David Rabe, based on the actual events of the incident on Hill 192 in 1966 during the Vietnam War.  The picture stars Michael J. Fox and Sean Penn.  An article written by Daniel Lang for "The New Yorker" in 1969, and a subsequent book were the movie's primary sources.

The New Yorker: The New Yorker is an American magazine of reportage, commentary, criticism, essays, fiction, satire, cartoons, and poetry.  It is published by Condé Nast.  Started as a weekly in 1925, the magazine is now published 47 times annually, with five of these issues covering two-week spans.

Supporting paragraphs: Casualties of War The New Yorker
Answer: The New Yorker