Question:
Zazi was born in a village in Paktia Province, Afghanistan. He has two sisters and two brothers. At the age of 7 in 1992, he and his family moved to the city of Peshawar in Pakistan where they settled as Afghan refugees. In 1999, he and the family left Pakistan and immigrated to New York City.
On September 10, as he crossed the George Washington Bridge headed for New York City, Zazi was pulled over by Port Authority Police, acting at the FBI's request, for what he was told was a routine random drug search, and his car was searched. They did not find anything of note, and he was allowed to go. Afzali's lawyer later wrote the court: "Even though [Zazi] is not the brightest bulb in the terrorist chandelier, the thinly-transparent ruse of a 'random' checkpoint stop did not fool him."  On September 11, Afzali called Zazi's father. Zazi's father then spoke with Zazi, told him that "they" had shown Afzali his photos and photos of others, said Afzali would call him and he should speak with him as soon as possible, and added "So, before anything else, speak with [Afzali]. See if you need to go to [Afzali] or to make ... yourself aware, hire an attorney." Afzali called Zazi, and told him that the authorities had asked him about "you guys." He also asked Zazi for the telephone number of one of the other men whose photos he had been shown, and set up a meeting with him.  Later that day, Zazi's rental car was towed due to a parking violation, and was searched. Agents found a laptop with a JPEG image of nine handwritten pages on how to make initiating explosives, main explosive charges, detonators, and fuses. The FBI asserted the nine pages of handwritten notes were in Zazi's handwriting.  Zazi called Afzali, said his car had been stolen and he feared he was being "watched", and that the people watching him took his car. Afzali asked if there was any "evidence" in the car, and Zazi said no.  When Zazi realized they were under investigation, the group threw away their bomb-making materials.
Answer this question using a quote from the text above:

what was he captured for?

Answer:
Agents found a laptop with a JPEG image of nine handwritten pages on how to make initiating explosives, main explosive charges, detonators, and fuses.


Question:
Shen Kuo (Chinese: Chen Gua ; 1031-1095), courtesy name Cunzhong (Cun Zhong ) and pseudonym Mengqi (now usually given as Mengxi) Weng (Meng Xi Weng ), was a Han Chinese polymathic scientist and statesman of the Song dynasty (960-1279). Excelling in many fields of study and statecraft, he was a mathematician, astronomer, meteorologist, geologist, zoologist, botanist, pharmacologist, agronomist, archaeologist, ethnographer, cartographer, encyclopedist, general, diplomat, hydraulic engineer, inventor, academy chancellor, finance minister, governmental state inspector, poet, and musician.
Since the time of the engineer and inventor Ma Jun (c. 200-265), the Chinese had used the south-pointing chariot, which did not employ magnetism, as a compass. In 1044 the Collection of the Most Important Military Techniques (Wu Jing Zong Yao ; Wujing Zongyao) recorded that fish-shaped objects cut from sheet iron, magnetized by thermoremanence (essentially, heating that produced weak magnetic force), and placed in a water-filled bowl enclosed by a box were used for directional pathfinding alongside the south-pointing chariot.  However, it was not until the time of Shen Kuo that the earliest magnetic compasses would be used for navigation. In his written work, Shen Kuo made the first known explicit reference to the magnetic compass-needle and the concept of true north. He wrote that steel needles were magnetized once they were rubbed with lodestone, and that they were put in floating position or in mountings; he described the suspended compass as the best form to be used, and noted that the magnetic needle of compasses pointed either south or north. Shen Kuo asserted that the needle will point south but with a deviation, stating "[the magnetic needles] are always displaced slightly east rather than pointing due south."  Shen Kuo wrote that it was preferable to use the twenty-four-point rose instead of the old eight compass cardinal points -- and the former was recorded in use for navigation shortly after Shen's death. The preference of use for the twenty-four-point-rose compass may have arisen from Shen's finding of a more accurate astronomical meridian, determined by his measurement between the pole star and true north; however, it could also have been inspired by geomantic beliefs and practices. The book of the author Zhu Yu, the Pingzhou Table Talks published in 1119 (written from 1111 to 1117), was the first record of use of a compass for seafaring navigation. However, Zhu Yu's book recounts events back to 1086, when Shen Kuo was writing the Dream Pool Essays; this meant that in Shen's time the compass might have already been in navigational use. In any case, Shen Kuo's writing on magnetic compasses has proved invaluable for understanding China's earliest use of the compass for seafaring navigation.
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What is significant about the magnetic needle compass?

Answer:
Shen Kuo made the first known explicit reference to the magnetic compass-needle and the concept of true north.