Although not ordered to take part, psychiatrists and many psychiatric institutions were involved in the planning and carrying out of Aktion T4 at every stage.[103] After protests from the German Catholic and Protestant churches, Hitler ordered the cancellation of the T4 program in August 1941,[104] although the disabled and mentally ill continued to be killed until the end of the war.[102] The medical community regularly received bodies and body parts for research. Eberhard Karl University received 1,077 bodies from executions between 1933 and 1945. The neuroscientist Julius Hallervorden received 697 brains from one hospital between 1940 and 1944: "I accepted these brains of course. Where they came from and how they came to me was really none of my business."[105]
Mengele became interested in using twins for medical research through his mentor, Verschuer. Verschuer himself was famous for experimenting with identical and fraternal twins in order to trace the genetic origins of various diseases. During the 1930s, twin research was seen as an ideal tool in weighing the factors of human heredity and environment. Mengele and his mentor had performed a number of legitimate research protocols using twins as test subjects throughout the 1930s. Now, at Auschwitz, with full license to maim or kill his subjects, Mengele performed a broad range of agonizing and often lethal experiments with Jewish and Roma (Gypsy) twins, most of them children.

The Roma refer to the genocide of the Romani people as the Pořajmos.[414] Because they are traditionally a private people with a culture based on oral history, less is known about their experience than that of any other group.[415] Bauer writes that this can be attributed to the Roma's distrust and suspicion, and to their humiliation because some of the taboos in Romani culture regarding hygiene and sex were violated at Auschwitz.[416] In May 1942, the Roma were placed under similar laws to the Jews. On 16 December 1942, Himmler issued a decree that "Gypsy Mischlinge [mixed breeds], Roma Gypsies, and members of the clans of Balkan origins who are not of German blood" should be sent to Auschwitz, unless they had served in the Wehrmacht.[417] He adjusted the order on 15 November 1943; in the occupied Soviet areas, "sedentary Gypsies and part-Gypsies are to be treated as citizens of the country. Nomadic Gypsies and part-Gypsies are to be placed on the same level as Jews and placed in concentration camps."[418] Bauer argues that this adjustment reflected Nazi ideology that the Roma, originally an Aryan population, had been "spoiled" by non-Romani blood.[419]

The Soviet Army reached Auschwitz on January 27, 1945. By that time, an estimated 1,500,000 Jews, along with 500,000 Polish prisoners, Soviet POWs and Gypsies, had perished there. As the Western Allies pushed into Germany in the spring of 1945, they liberated Buchenwald, Bergen-Belsen, and Dachau. Now the full horror of the twelve-year Nazi regime became apparent as British and American soldiers, including Supreme Commander Dwight D. Eisenhower, viewed piles of emaciated corpses and listened to vivid accounts given by survivors.
At Auschwitz, Yanina survived the gas chamber when adult bodies fell on top of her, protecting her from inhaling a lethal amount of poison gas. Found moaning by Jewish slave laborers who were forced to remove the bodies from the gas chambers, Yanina was resuscitated, given a uniform and told to blend in. Prisoners under the age of 15 were routinely gassed at Auschwitz, but Yanina was able to escape detection after her remarkable rescue.
The pursuit resumed with a vengeance. In 1982, the agency even considered abducting a 12-year-old boy and threatening to take his life unless his father, Hans-Ulrich Rudel, a devoted Nazi and a childhood friend of Mengele’s, gave them the information that could lead to his capture. (In the end, Rudel died before the Mossad decided whether to go through with the operation.)
These programmes are best seen as a series of linked genocides, each having its own history, background, purpose and significance in the Nazi scheme of things. The Holocaust was the biggest of the killing programmes and, in certain important ways, different from the others. The Jews figured in Nazi ideology as the arch-enemy of the 'Aryan race', and were targeted not merely for terror and repression but for complete extinction. The Nazis failed in this aim because they ran out of time, but they pursued it fanatically until their defeat in 1945. The Holocaust led to widespread public awareness of genocide and to modern efforts to prevent it, such as the 1948 UN Convention on Genocide.

"He grabbed my arm and turned me around," said Freund, now 82. "I was skinny, already. Thank God I didn't have a pimple on my body, because a pimple was all you needed to be sent to the crematorium." (The gas chambers at Auschwitz were located in the crematorium buildings, so that the bodies could be burned immediately after the victims were gassed.)
In most ghettos, Nazis ordered the Jews to establish a Judenrat (Jewish council) to administer Nazi demands and to regulate the internal life of the ghetto. The Nazis routinely ordered deportations from the ghettos. In some of the large ghettos, 1,000 people per day were sent by rail to concentration and extermination camps. To get them to cooperate, the Nazis told the Jews they were being transported elsewhere for labor.

It's impossible to overstate how phenomenally influential The Diary of a Young Girl is. It was first published in 1947 in Dutch as Het Achterhius (Secret Annex), but later became the most translated Dutch book ever—it's been translated into seventy languages in sixty countries. So far, it's sold 30 million copies. It's also been produced as a play and has been adapted into several films.
In 1953, the Knesset, Israel's parliament, passed a law creating Yad Vashem as the country's Martyrs' and Heroes' Memorial Authority. Its tasks included commemorating the six million Jews killed by the Nazis and their collaborators during the Holocaust, paying tribute to those Jewish resistance fighters, and honoring those "high-minded Gentiles who risked their lives to save Jews." The title Righteous Among the Nations is taken from Jewish tradition (the literature of the Sages) that describes non-Jews who helped the Jewish people in times of need.
Astonishingly, the Nazified notion of “race” leaped out in a line attributed to Hellman and nowhere present in the diary. “We’re not the only people that’ve had to suffer,” the Hacketts’ Anne says. “There’ve always been people that’ve had to . . . sometimes one race . . . sometimes another.” This pallid speech, yawning with vagueness, was conspicuously opposed to the pivotal reflection it was designed to betray:
Inside the Soviet Union were an estimated three million Jews, many of whom still lived in tiny isolated villages known as Shtetls. Following behind the invading German armies, four SS special action units known as Einsatzgruppen systematically rounded-up and shot all of the inhabitants of these Shtetls. Einsatz execution squads were aided by German police units, local ethnic Germans, and local anti-Semitic volunteers. Leaders of the Einsatzgruppen also engaged in an informal competition as to which group had the highest tally of murdered Jews.
From 1933 until 1938, most of the people held in concentration camps were political prisoners and people the Nazis labeled as "asocial." These included the disabled, the homeless, and the mentally ill. After Kristallnacht in 1938, the persecution of Jews became more organized. This led to the exponential increase in the number of Jews sent to concentration camps.
The Holocaust was the murder by Nazi Germany of six million Jews. While the Nazi persecution of the Jews began in 1933, the mass murder was committed during World War II. It took the Germans and their accomplices four and a half years to murder six million Jews. They were at their most efficient from April to November 1942 – 250 days in which they murdered some two and a half million Jews. They never showed any restraint, they slowed down only when they began to run out of Jews to kill, and they only stopped when the Allies defeated them. More...

Mengele’s crimes had been well documented before the International Military Tribunal (IMT) and other postwar courts. West German authorities issued a warrant for his arrest in 1959, and a request for extradition in 1960. Alarmed by the capture of Adolf Eichmann in Buenos Aires in that same year, Mengele moved to Paraguay and then to Brazil. He spent the last years of his life near Sao Pãolo. In declining health, Mengele suffered a stroke and drowned while swimming at a vacation resort near Bertioga, Brazil, on February 7, 1979. He was buried in a suburb of Sao Pãolo under the fictive name “Wolfgang Gerhard.”
In early 1943, encouraged by von Verschuer, Mengele applied to transfer to the concentration camp service.[20][30] His application was accepted and he was posted to Auschwitz, where he was appointed by SS-Standortarzt Eduard Wirths, chief medical officer at Auschwitz, to the position of chief physician of the Zigeunerfamilienlager (Romani family camp) at Birkenau,[20][30] a subcamp located on the main Auschwitz complex. The SS doctors did not administer treatment to the Auschwitz inmates, but supervised the activities of inmate doctors who had been forced to work in the camp medical service.[31] As part of his duties, Mengele made weekly visits to the hospital barracks and ordered any prisoners who had not recovered after two weeks in bed to be sent to the gas chambers.[32]