Some context: Irving Grant Thalberg (May 30, 1899 - September 14, 1936) was an American film producer during the early years of motion pictures. He was called "The Boy Wonder" for his youth and ability to select scripts, choose actors, gather production staff, and make profitable films, including Grand Hotel, China Seas, Camille, Mutiny on the Bounty, and The Good Earth. His films carved out an international market, "projecting a seductive image of American life brimming with vitality and rooted in democracy and personal freedom," states biographer Roland Flamini.
Thalberg was born in Brooklyn, to German Jewish immigrant parents, William and Henrietta (Haymann). Shortly after birth, he was diagnosed with "blue baby syndrome," caused by a congenital disease that limited the oxygen supply to his heart. The prognosis from the family's doctor and specialists was that he might live to age twenty, or at most, age thirty.  During his high school years in Brooklyn, he began having attacks of chest pains, dizziness and fatigue. This affected his ability to study, though until that time he was a good student. When he was 17, he contracted rheumatic fever, and was confined to bed for a year. His mother, Henrietta, to prevent him falling too far behind other students, brought him homework from school, books, and tutors to teach him at home. She also hoped that the schoolwork and reading would distract him from the "tantalizing sounds" of children playing outside his window.  With little to entertain him, he read books as a main activity. He devoured popular novels, classics, plays, and biographies. His books, of necessity, replaced the streets of New York, and led to his interest in classical philosophy and philosophers, such as William James.  When Thalberg returned to school, he finished high school but lacked the stamina for college, which he felt would have required constant late-night studying and cramming for exams. Instead, he took part-time jobs as a store clerk, and in the evenings, to gain some job skills, taught himself typing, shorthand and Spanish at a night vocational school. When he turned 18, he placed an ad with the local newspaper hoping to find better work:  "Situation Wanted: Secretary, stenographer, Spanish, English, high school education, no experience; $15."
How did this syndrome affect his life?
A: During his high school years in Brooklyn, he began having attacks of chest pains, dizziness and fatigue.
Some context: Christopher Houston Carson (December 24, 1809 - May 23, 1868), better known as Kit Carson, was an American frontiersman. He was a mountain man (fur trapper), wilderness guide, Indian agent, and U.S. Army officer. Carson became a frontier legend in his own lifetime via biographies and news articles. Exaggerated versions of his exploits were the subject of dime novels.
Carson wanted to take a winter break from the campaign. Major General Carleton refused. Kit was ordered to invade the Canyon de Chelly. It was here that many Navajos had taken refuge. Historian David Roberts writes, "Carson's sweep through the Canyon de Chelly in the winter of 1863-1864 would prove to be the decisive action in the Campaign."  The Canyon de Chelly was a sacred place for the Navajo. They believed that it would now be their strongest sanctuary. Three hundred Navajo took refuge on the canyon rim at a place called Fortress Rock. They resisted Carson's invasion by building rope ladders and bridges, lowering water pots into a stream, and keeping quiet and out of sight. These three hundred Navajo survived the invasion. In January 1864, Carson swept through the 35-mile (56 km) Canyon with his forces. The thousands of peach trees in the canyon were cut down. Few Navajo were killed or captured. Carson's invasion, however, proved to the Navajo that the United States could invade their country at any time. Many Navajo surrendered at Fort Canby.  By March 1864, there were 3,000 refugees at Fort Canby. An additional 5,000 arrived in the camp. They were suffering from the intense cold and hunger. Carson asked for supplies to feed and clothe them. The thousands of Navajo were led to Bosque Redondo. Many died along the way. Stragglers in the rear were shot and killed. In Navajo history, this horrific trek is known as Long Walk of the Navajo. By 1866, reports indicated that Bosque Redondo was a complete failure. Major Carleton was fired. Congress started investigations. In 1868, a treaty was signed, and the Navajo were allowed to return to their homeland. Bosque Redondo was closed.
What is Canyon de Chelly?
A:
The Canyon de Chelly was a sacred place for the Navajo.