Question: What prompted the complaint from the pioneer in artificial satellites to the legislator of United Nations Security Council Resolution 731?

<P0-S0> Since then, about 6,600 satellites from more than 40 countries have been launched. <P0-S1> According to a 2013 estimate, 3,600 remained in orbit. <P0-S2> Of those, about 1,000 were operational; while the rest have lived out their useful lives and become space debris. <P0-S3> In 1957 the Soviet Union launched the world's first artificial satellite, Sputnik 1. <P0-S4> Approximately 500 operational satellites are in low - Earth orbit, 50 are in medium - Earth orbit (at 20,000 km), and the rest are in geostationary orbit (at 36,000 km). <P0-S5> A few large satellites have been launched in parts and assembled in orbit. <P0-S6> Over a dozen space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Mercury, Venus, Mars, Jupiter, Saturn, a few asteroids, a comet and the Sun. <SEP> <P1-S0> UN Security Council Resolution 731, adopted unanimously on 21 January 1992, after recalling resolutions 286 (1970) and 635 (1989) which condemned acts of terrorism, the Council expressed its concern over the results of investigations into the destruction of Pan Am Flight 103 over Lockerbie, Scotland, and UTA Flight 772 over Chad and Niger which implicated officials from the Government of Libya. <SEP> <P2-S0> In the resulting Battle of Pusan Perimeter (August–September 1950), the U.S. Army withstood KPA attacks meant to capture the city at the Naktong Bulge, P'ohang-dong, and Taegu. <P2-S1> The United States Air Force (USAF) interrupted KPA logistics with 40 daily ground support sorties that destroyed 32 bridges, halting most daytime road and rail traffic. <P2-S2> KPA forces were forced to hide in tunnels by day and move only at night. <P2-S3> To deny matériel to the KPA, the USAF destroyed logistics depots, petroleum refineries, and harbors, while the U.S. Navy air forces attacked transport hubs. <P2-S4> On 27 August, 67th Fighter Squadron aircraft mistakenly attacked facilities in Chinese territory and the Soviet Union called the UN Security Council's attention to China's complaint about the incident. <P2-S5> Consequently, the over-extended KPA could not be supplied throughout the south. <P2-S6> The US proposed that a commission of India and Sweden determine what the US should pay in compensation but the Soviets vetoed the US proposal. <SEP> <P3-S0> united nations security council resolution 129, adopted unanimously on august 7, 1958, called an emergency special session of the general assembly. <P3-S1> the resolution states that this was as a result of the lack of unanimity of its permanent members at the council's 834th and 837th meetings which prevented it from exercising its primary responsibility for the maintenance of international peace and security. <SEP> <P4-S0> united nations security council resolution 769, adopted unanimously on 7 august 1992, after reaffirming resolution 743 (1992) and all subsequent resolutions relating to the united nations protection force (unprofor), the council authorised enlargements in the strength and mandate of unprofor to "enable the force to control the entry of civilians into the united nations protected areas", in addition to performing immigration and customs functions.