By 17 May, the main Austrian army under Charles had arrived on the Marchfeld. Charles kept the bulk of his troops several kilometres away from the river bank in hopes of concentrating them at the point where Napoleon decided to cross.
Physicist William Arnold Anthony (who tested the motor) and Electrical World magazine editor Thomas Commerford Martin arranged for Tesla to demonstrate his AC motor on 16 May 1888 at the American Institute of Electrical Engineers.
In 1906 Carrier discovered that "constant dew-point depression provided practically constant relative humidity," which later became known among air conditioning engineers as the "law of constant dew-point depression". On this discovery he based the design of an automatic control system, for which he filed a patent claim on May 17, 1907. U.S. Patent 1,085,971 was issued on February 3, 1914.
The Bank for International Settlements (BIS) became an object of scrutiny when the Norwegian delegation put forth evidence that the BIS was involved in war crimes. The BIS, formed in 1930, was originally primarily intended to facilitate settling financial obligations arising from the peace treaties that concluded the First World War.
A SAS reconnaissance team was dispatched to carry out preparations for a seaborne infiltration. A Westland Sea King helicopter carrying the assigned team took off from HMS Invincible on the night of 17 May, but bad weather forced it to land 50 miles (80 km) from its target and the mission was aborted.
A U.S. Navy ship, Stark, was struck on 17 May 1987 by two Exocet anti-ship missiles fired from an Iraqi F-1 Mirage plane. The missiles had been fired at about the time the plane was given a routine radio warning by Stark. The frigate did not detect the missiles with radar, and warning was given by the lookout only moments before they struck. Both missiles hit the ship, and one exploded in crew quarters, killing 37 sailors and wounding 21.
On the evening of 17 May, the PSC met at Zhongnanhai to finalize plans for martial law. At the meeting, Zhao announced that he was ready to "take leave", citing he could not bring himself to carry out martial law. The elders in attendance at the meeting, Bo Yibo and Yang Shangkun, urged the PSC to follow Deng's orders. Zhao did not consider the inconclusive PSC vote to have legally binding implications on martial law; Yang Shangkun, in his capacity as Vice Chairman of the Central Military Commission, went on to mobilize the military to move into the capital.
The situation seemed intractable, so the weight of taking decisive action fell on paramount leader Deng Xiaoping. Matters came to a head on 17 May, during a Politburo Standing Committee meeting at Deng's residence. At the meeting, Zhao Ziyang's concessions-based strategy was thoroughly criticized.
The movement, on the wane at the end of April, now regained momentum. By 17 May, as students from across the country poured into the capital to join the movement, protests of varying sizes were occurring in some 400 Chinese cities. Students demonstrated at provincial party headquarters in Fujian, Hubei, and Xinjiang. Without a clearly articulated official position from the Beijing leadership, local authorities did not know how to respond. Because the demonstrations now included a wide array of social groups, each carrying its own set of grievances, it became increasingly unclear with whom the government should negotiate, and what the demands were.
Maradona era in Napoli included the UEFA Cup in 1989. The 1989 UEFA Cup Final was a football tie played on 3 May 1989 and 17 May 1989 between S.S.C. Napoli of Italy and VfB Stuttgart of West Germany. Napoli won 5–4 on aggregate.
On 17 May 1994, the UN passed Resolution 918, which imposed an arms embargo and reinforced UNAMIR, which would be known as UNAMIR II. The new soldiers did not start arriving until June, and following the end of the genocide in July, the role of UNAMIR II was largely confined to maintaining security and stability, until its termination in 1996.
On 8 May 2018, the government of the Democratic Republic of the Congo reported two confirmed cases of Ebola infection in the northwestern town of Bikoro. On 17 May, a case was confirmed in the city of Mbandaka. Health authorities are planning to ring vaccinate with rVSV-ZEBOV, a recently developed experimental Ebola vaccine, to contain the outbreak. The outbreak is ongoing as of 24 June 2018, in 2014 a different area of Equateur province was affected On July 24, 2018, the outbreak was declared over. This resulted in 54 infections and 33 deaths.