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EVB2935506: Albert Shanker (1928-1997), leader of the New York City teachers union, threatened to strike during contract negotiations, holding a report issued by mediators in 1965. His militancy was the basis of a joke in Woody Allen's 1973 movie, SLEEPER. Shanker, holds report issued by mediators in 1965 / Bridgeman Images
EVB2936467: Fully dressed female patient lying on the operating table, surrounded by the surgeons of Massachusetts General Hospital in one of the earliest operations performed under ether anesthesia. Among the surgeons is Dr. John Collins Warren, the doctor who first demonstrated surgical anesthesia / Bridgeman Images
EVB2936225: U.S. flag waving in foreground over flight deck of an escort carrier on July 16, 1943. Of the 151 aircraft carriers built in the United States during WWII, 122 were escort carriers, cheaper, slower, lighter ships often used to protect convoys and provide air support during island invasions / Bridgeman Images
EVB2936644: Circulation of the blood from William Harvey's ON THE MOTIONS OF THE HEART AND BLOOD, 1628. Illustrations of a tourniqueted human forearms with pronounced superficial blood veins to indicate circulation. Fig. 3: Blood flow is blocked at two points, O and H. At O, the blood pools in a valve and does not flow toward the hand, but flows toward the heart. Fig. 4: Blood flow is blocked at two points, M and N, with no valve within section / Bridgeman Images