Answer the question at the end by quoting:

Sir Joseph Rotblat  (4 November 1908 - 31 August 2005) was a Polish physicist, a self-described "Pole with a British passport". Rotblat worked on Tube Alloys and the Manhattan Project during World War II, but left the Los Alamos Laboratory after the war with Germany ended. His work on nuclear fallout was a major contribution toward the ratification of the 1963 Partial Nuclear Test Ban Treaty. A signatory of the 1955 Russell-Einstein Manifesto, he was secretary-general of the Pugwash Conferences on Science and World Affairs from their founding until 1973, and shared, with the Pugwash Conferences, the 1995 Nobel Peace Prize "for efforts to diminish the part played by nuclear arms in international affairs and, in the longer run, to eliminate such arms."
While still in Poland, Rotblat had realised that nuclear fission might possibly be used to produce an atomic bomb. He first thought that he should "put the whole thing out of my mind", but he continued because he thought the only way to prevent Nazi Germany from using a nuclear bomb was if Britain had one to act as a deterrent. He worked with Chadwick on Tube Alloys, the British atomic bomb project.  In February 1944, Rotblat joined the Los Alamos Laboratory as part of Chadwick's British Mission to the Manhattan Project. The usual condition for people to work on the Manhattan Project was that they had to become US citizens or British subjects. Rotblat declined, and the condition was waived. At Los Alamos, he was befriended by Stan Ulam, a fellow Polish-Jewish scientist, with whom he was able to converse in Polish. Rotblat worked in Egon Bretscher's group, investigating whether high-energy gamma rays produced by nuclear fission would interfere with the nuclear chain reaction process, and then with Robert R. Wilson's cyclotron group.  Rotblat continued to have strong reservations about the use of science to develop such a devastating weapon. In 1985 he related that at a private dinner at the Chadwicks' house at Los Alamos in March 1944, he was shocked to hear the director of the Manhattan Project, Major General Leslie R. Groves, Jr., say words to the effect that the real purpose in making the bomb was to subdue the Soviets. Historians, notably Barton Bernstein, have cast doubt on this story.  By the end of 1944 it was also apparent that Germany had abandoned the development of its own bomb and Rotblat asked to leave the project. Chadwick was then shown a security dossier in which Rotblat was accused of being a Soviet spy and that, having learned to fly at Los Alamos, he was suspected of wanting to join the Royal Air Force so that he could fly to Poland and defect to the Soviet Union. In addition, he was accused of visiting someone in Santa Fe and leaving them a blank cheque to finance the formation of a communist cell.  Rotblat was able to show that much of the information within the dossier had been fabricated. In addition, FBI records show that in 1950, Rotblat's friend in Santa Fe was tracked down in California, and she flatly denied the story; the cheque had never been cashed and had been left to pay for items not available in the UK during the war. In 1985, Rotblat recounted how a box containing "all my documents" went missing on a train ride from Washington D.C. to New York as he was leaving the country, but the presence of large numbers of Rotblat's personal papers from Los Alamos now archived at the Churchill Archives Centre "is totally at odds with Rotblat's account of events". Due to suspicions that he was a Soviet spy, Rotblat was not permitted to re-enter the United States until 1964.

Did he work on this with other people?

Rotblat joined the Los Alamos Laboratory as part of Chadwick's British Mission to the Manhattan Project.

IN: O'Keeffe was born on November 15, 1887, in a farmhouse located at 2405 Hwy T in the town of Sun Prairie, Wisconsin. Her parents, Francis Calyxtus O'Keeffe and Ida (Totto) O'Keeffe, were dairy farmers. Her father was of Irish descent. Her maternal grandfather George Victor Totto, for whom O'Keeffe was named, was a Hungarian count who came to the United States in 1848.

O'Keeffe then spent part of nearly every year working in New Mexico. She collected rocks and bones from the desert floor and made them and the distinctive architectural and landscape forms of the area subjects in her work. Known as a loner, O'Keeffe explored the land she loved often in her Ford Model A, which she purchased and learned to drive in 1929. She often talked about her fondness for Ghost Ranch and Northern New Mexico, as in 1943, when she explained: "Such a beautiful, untouched lonely feeling place, such a fine part of what I call the 'Faraway'. It is a place I have painted before ... even now I must do it again."  Due to exhaustion and poor health, she did not work from late 1932 until about the mid-1930s. She was a popular and reputed artist. She received a number of commissions and her works were exhibited in New York and other places. In 1936, she completed what would become one of her most well-known paintings, Summer Days, in 1936. It depicted a desert scene with a deer skull with vibrant wildflowers. Resembling Ram's Head with Hollyhock, it depicted the skull floating above the horizon.  In 1938, the advertising agency N. W. Ayer & Son approached O'Keeffe about creating two paintings for the Hawaiian Pineapple Company (now Dole Food Company) to use in their advertising. Other artists who produced paintings of Hawaii for the Hawaiian Pineapple Company's advertising include Lloyd Sexton, Jr., Millard Sheets, Yasuo Kuniyoshi, Isamu Noguchi, and Miguel Covarrubias. The offer came at a critical time in O'Keeffe's life: she was 51, and her career seemed to be stalling (critics were calling her focus on New Mexico limited, and branding her desert images "a kind of mass production"). She arrived in Honolulu February 8, 1939 aboard the SS Lurline, and spent nine weeks in Oahu, Maui, Kauai, and the island of Hawaii. By far the most productive and vivid period was on Maui, where she was given complete freedom to explore and paint. She painted flowers, landscapes, and traditional Hawaiian fishhooks. Back in New York, O'Keeffe completed a series of 20 sensual, verdant paintings. However, she did not paint the requested pineapple until the Hawaiian Pineapple Company sent a plant to her New York studio.  During the 1940s O'Keeffe had two one-woman retrospectives, the first at the Art Institute of Chicago (1943). Her second was in 1946, when she was the first woman artist to have a retrospective at the Museum of Modern Art (MoMA) in Manhattan. Whitney Museum of American Art began an effort to create the first catalogue of her work in the mid-1940s.  In the 1940s, O'Keeffe made an extensive series of paintings of what is called the "Black Place", about 150 miles west of her Ghost Ranch house. O'Keeffe said that the Black Place resembled "a mile of elephants with gray hills and white sand at their feet." She made paintings of the "White Place", a white rock formation located near her Abiquiu house.

Did she work with any other artists?

OUT: