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The diversion of heavier bombers to the Balkans meant that the crews and units left behind were asked to fly two or three sorties per night. Bombers were noisy, cold, and vibrated badly. Added to the tension of the mission which exhausted and drained crews, tiredness caught up with and killed many. In one incident on 28/29 April, Peter Stahl of KG 30 was flying on his 50th mission. He fell asleep at the controls of his Ju 88 and woke up to discover the entire crew asleep. He roused them, ensured they took oxygen and Dextro-Energen tablets, then completed the mission.

How many sorties a night were crews asked to fly?
Answer: two or three sorties
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In Methodism, Mary is honored as the Mother of God. Methodists do not have any additional teachings on the Virgin Mary except from what is mentioned in Scripture and the ecumenical Creeds. As such, Methodists believe that Mary was conceived in her womb through the Holy Ghost and accept the doctrine of the Virgin Birth, although they, along with Orthodox Christians and other Protestant Christians, reject the doctrine of the Immaculate Conception. John Wesley, the principal founder of the Methodist movement within the Church of England, believed that Mary "continued a pure and unspotted virgin", thus upholding the doctrine of the perpetual virginity of Mary. Contemporary Methodism does hold that Mary was a virgin before, during, and immediately after the birth of Christ. In addition, some Methodists also hold the doctrine of the Assumption of Mary as a pious opinion.

Which Marian doctrine did John Wesley uphold in founding Methodism?
Answer: the perpetual virginity of Mary
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As with the minerals discussed above, some vitamins are recognized as organic essential nutrients, necessary in the diet for good health. (Vitamin D is the exception: it can be synthesized in the skin, in the presence of UVB radiation.) Certain vitamin-like compounds that are recommended in the diet, such as carnitine, are thought useful for survival and health, but these are not "essential" dietary nutrients because the human body has some capacity to produce them from other compounds. Moreover, thousands of different phytochemicals have recently been discovered in food (particularly in fresh vegetables), which may have desirable properties including antioxidant activity (see below); however, experimental demonstration has been suggestive but inconclusive. Other essential nutrients that are not classified as vitamins include essential amino acids (see above), choline, essential fatty acids (see above), and the minerals discussed in the preceding section.

What is required for vitamin D to be synthesized?
Answer:
UVB radiation