September 10

On 10 September 1932, the Independent Subway System (IND) opened its first line in New York City, introducing the city's third municipally-owned subway network alongside the IRT and BMT lines. Spearheaded by Mayor John Hylan, the IND was designed to compete with privately operated companies and expand public transit access. The initial segment ran along the Eighth Avenue Line from Hudson Terminal to 50th Street in Manhattan. The system featured wider cars, faster service, and modern station designs with distinctive Art Deco tiling. Its opening marked a major expansion of New York's subway infrastructure and demonstrated the city's commitment to public control over mass transit. In subsequent years, the IND would extend into Brooklyn and Queens, reshaping commuting patterns across the metropolis.

On 10 September 1976, British Airways Flight 476, a Hawker Siddeley Trident, and Inex-Adria Airways Flight 550, a McDonnell Douglas DC-9, collided in foggy conditions near Zagreb. The impact and subsequent crash into a mountainside resulted in the deaths of all 176 passengers and crew aboard both jets. Investigators cited air traffic control errors and limited radar capabilities as key factors in the disaster. This tragedy prompted reviews of mid-air collision avoidance procedures and led to enhancements in air traffic management technology. It remains a pivotal event in the history of aviation safety.