In Istanbul, two terrorists from Abu Nidal's organization kill 22 and wound six congregants inside the Neve Shalom Synagogue during Shabbat services.

Sabri Khalil al-Banna (May 1937 16 August 2002), known by his nom de guerre Abu Nidal, was the founder of Fatah: The Revolutionary Council, a militant Palestinian splinter group more commonly known as the Abu Nidal Organization (ANO). At the height of its militancy in the 1970s and 1980s, the ANO was widely regarded as the most ruthless of the Palestinian groups.Abu Nidal ("father of struggle") formed the ANO in October 1974 after a split from Yasser Arafat's Fatah faction within the Palestine Liberation Organization (PLO). Acting as a freelance contractor, Abu Nidal is believed to have ordered attacks in 20 countries, killing over 300 and injuring over 650. The group's operations included the Rome and Vienna airport attacks on 27 December 1985, when gunmen opened fire on passengers in simultaneous shootings at El Al ticket counters, killing 20. Patrick Seale, Abu Nidal's biographer, wrote of the shootings that their "random cruelty marked them as typical Abu Nidal operations".Abu Nidal died after a shooting in his Baghdad apartment in August 2002. Palestinian sources believed he was killed on the orders of Saddam Hussein, while Iraqi officials insisted he had committed suicide during an interrogation. "He was the patriot turned psychopath", David Hirst wrote in the Guardian on the news of his death. "He served only himself, only the warped personal drives that pushed him into hideous crime. He was the ultimate mercenary."

Istanbul ( IST-an-BUUL, US also IST-an-buul; Turkish: İstanbul [isˈtanbuɫ] (listen)), formerly known as Constantinople, is the largest city in Turkey, serving as the country's economic, cultural and historic hub. The city straddles the Bosporus strait, lying in both Europe and Asia, and has a population of over 15 million residents, comprising 19% of the population of Turkey. Istanbul is the most populous European city, and the world's 15th-largest city.

The city was founded as Byzantium (Byzantion) in the 7th century BC by Greek settlers from Megara. In 330 CE, the Roman emperor Constantine the Great made it his imperial capital, renaming it first as New Rome (Nova Roma) and then as Constantinople (Constantinopolis) after himself. The city grew in size and influence, eventually becoming a beacon of the Silk Road and one of the most important cities in history.

The city served as an imperial capital for almost 1600 years: during the Roman/Byzantine (330–1204), Latin (1204–1261), late Byzantine (1261–1453), and Ottoman (1453–1922) empires. The city played a key role in the advancement of Christianity during Roman/Byzantine times, hosting four (including Chalcedon (Kadıköy) on the Asian side) of the first seven ecumenical councils (all of which were in present-day Turkey) before its transformation to an Islamic stronghold following the Fall of Constantinople in 1453 CE—especially after becoming the seat of the Ottoman Caliphate in 1517.In 1923, after the Turkish War of Independence, Ankara replaced the city as the capital of the newly formed Republic of Turkey. In 1930, the city's name was officially changed to Istanbul, the Turkish rendering of the appellation Greek speakers used since the eleventh century to colloquially refer to the city.Over 13.4 million foreign visitors came to Istanbul in 2018, eight years after it was named a European Capital of Culture, making it the world's eighth most visited city. Istanbul is home to several UNESCO World Heritage Sites, and hosts the headquarters of numerous Turkish companies, accounting for more than thirty percent of the country's economy.