Question: Walter Iooss is a photographer who has taken images of the boxer who was of what nationality?

Context paragraphs:
Lu Nan: Lu Nan is a contemporary photographer who was born in Beijing, China in 1962.  After working for National Pictorial for 5 years, he decided to become an independent photographer.  From 1989 to 1990, he shot a series of images of the living conditions of Chinese psychopaths.  From 1992 to 1996, he shot a series of images about Catholicism in China.  From 1996 to 2004, he shot a series images of the daily life of Tibetan farmers.  Lu Nan is known as "the most legendary photographer in China".  Compared to the photography filed, his reputation in the art field seems to be greater.  His early photograph "Increase one meter for unknown mountain" has become the most classic image of Chinese contemporary art.  He is also the only Chinese contemporary photographer chosen by Aperture magazine as a topic colon.

Edouard Kutter (1934): Édouard Kutter Jr. (born 1934) is a Luxembourgish photographer and publisher.  The son of the photographer Édouard Kutter Sr. (1887–1978), he was appointed court photographer in 1966.  In 1963, he took over his father's photographic business.  In 1986, with the agreement of the Court, he donated to Luxembourg's Photothèque some two thousand photographs of the Grand Ducal family taken by his father between 1896 and 1960.  At the end of 1989, he also donated his own collection of images taken between 1960 and 1980 documenting the development of the city.

Keepers of the Streak: Keepers of the Streak is a documentary by ESPN Films that focuses on four photographers who have attended and photographed the first forty-eight Super Bowl games from 1967 to 2014.  John Biever, Walter Iooss, Mickey Palmer and Tony Tomsic are the focus of the film, and have their stories told throughout.  It is directed by Neil Leifer.

Melvin Vaniman: Chester Melvin Vaniman (1866 – 1912) was an American photographer, adventurer and businessman who specialized in panoramic images taken from height and was nicknamed the "Acrobatic Photographer."  He shot images from gas balloons, ships masts, tall buildings and even a home-made 30 meter pole.  He was a famous aviator and balloonist.  He scaled buildings, hung from self-made slings, and scaled dangerous heights to capture his unique images.

Muhammad Ali: Muhammad Ali ( ; born Cassius Marcellus Clay Jr.; January 17, 1942 – June 3, 2016) was an American professional boxer and activist.  He is widely regarded as one of the most significant and celebrated sports figures of the 20th century.  From early in his career, Ali was known as an inspiring, controversial, and polarizing figure both inside and outside the ring.

Arab Images Foundation: Based on an idea by Samer Mohdad author and photographer, the Arab Image Foundation was officially registered in Beirut, Lebanon in 1997.  The Arab Image Foundation has informally started its activities much earlier through personal involvement of its founding members.  As soon as 1993, it reintroduced artistic photography in Lebanon by organizing the first post conflict photography exhibition during the first publication of the book ‘’les enfants de la guerre, Liban 1985-1992’’ (Children of war, 1985–1992).  The Arab Images Foundation members' activities have centered on creating an institutional collection of regional historical photographs in Saudi Arabia in 2000.  Nowadays the main activity of the Arab Image Foundations wraps around preserving and safe keeping of the Arabic photography heritage.  This purpose materialises by producing and realising books and photography exhibitions, by promoting, rehabilitating, conservation and diffusing historical and contemporary works.

Ernest Brooks (photographer): Ernest Brooks (23 February 1876 — 1957) was a British photographer, best known for his war photography from the First World War.  He was the first official photographer to be appointed by the British military, and produced several thousand images between 1915 and 1918, more than a tenth of all British official photographs taken during the war.  His work was often posed and formal, but several of his less conventional images are marked by a distinctive use of silhouette.  Before and immediately after the war he worked as an official photographer to the Royal Family, but was dismissed from this appointment and stripped of his official honours in 1925.

Walter Iooss: Walter Iooss Jr. ( ; born May 15, 1943 in Temple, Texas) is an American photographer best known for his award-winning images of sports' greatest athletes, including Michael Jordan, Kelly Slater, Tiger Woods, Scottie Pippen, and Muhammad Ali.  He has been called "the poet laureate of sports."

John Paul Caponigro: John Paul Caponigro (born June 23, 1965 Boston) is an Environmental Fine Art Landscape Photographer.  He is the son of the American photographer Paul Caponigro and Eleanor Caponigro a graphic designer.  John Paul attended Yale University, and the University of California, Santa Cruz where he was trained as a painter and later as a photographer.  After college John moved to Maine and became an artist in residence at The Center for Creative Imaging.  John now works with photo-based digital imaging as his primary medium.  Dan Steinhardt of Epson considers John Paul "...one of the great mentors of the photographic medium".  The American photographer Joyce Tenneson has said, "John Paul Caponigro is the rare combination of gifted artist and master technician.  He works from the heart to create images that are poetic and evocative, and at times, mystical.  He is someone whose sensitivity and intelligence work to break new ground, and someone I will enjoy watching in the years to come." .  He has been awarded membership into many photographic organizations including the Photoshop Hall of Fame, the Epson Stylus Pros, Xrite Coloratti, and the Canon Explorers of Light.  His work crosses the lines between photography and painting and displays knowledge of painterly composition and color theory, coupled with content of modern science, psychology, primal cultures, and the environment.  The photographer Arnold Newman stated,"...Caponigro's mysterious and magical images go beyond reality or surrealism.  He has created a wonderful new world of his own".  John Paul Caponigro lives in Cushing, Maine with his photographer wife Arduina, and their son.

Stockland Martel: Stockland Martel is a photo-representation agency headquartered in New York and founded in 1983 by Bill Stockland and Maureen Martel.  The first person they signed was legendary "Sports Illustrated" photographer Walter Iooss, and in the years since they have developed a diverse international roster of award-winning photographers.  These include 2009 Prix Pictet winner Nadav Kander, Timothy Greenfield-Sanders, and Lauren Greenfield.

Supporting paragraphs: Walter Iooss Muhammad Ali
Answer: American