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Cameras with focal-plane shutters—even if they had PC connectors with X, F, M, or S-sync delays ("xenon sync" with zero delay and flashbulbs with peak delays of 5, 20, and 30 ms)—could not be used at speeds that attenuated guide numbers with most types of flashbulbs because their light curves were characterized by rapid rise and fall rates; the second shutter curtain would begin wiping ...
As of November 30, 2012, 456 children were enrolled in kindergarten through fourth grade at Sandy Hook Elementary School. [13] The school's security protocols had recently been upgraded, requiring visitors to be individually admitted after visual and identification review by video monitor.
Insurance is a means of protection from financial loss in which, in exchange for a fee, a party agrees to compensate another party in the event of a certain loss, damage, or injury.
Festivities in Windsor Castle by Paul Sandby, c. 1776. Guy Fawkes Night, also known as Guy Fawkes Day, Bonfire Night and Fireworks Night, is an annual commemoration observed on 5 November, primarily in Great Britain, involving bonfires and fireworks displays.
The Oklahoma City bombing was a domestic terrorist truck bombing of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, United States, on April 19, 1995, the second anniversary of the end to the Waco siege.
A survivor recalls the events of the day. By 12:00 p.m., SWAT teams were stationed outside the school, and ambulances started taking the wounded to local hospitals. A call for additional ammunition for police officers in case of a shootout came at 12:20.
Osama bin Laden [a] (10 March 1957 – 2 May 2011) was a Saudi Arabian–born Islamist dissident and militant leader who was the founder and first general emir of al-Qaeda, a militant terrorist organization espousing Islamism, pan-Islamism and jihadism.
Aristotle [A] (Attic Greek: Ἀριστοτέλης, romanized: Aristotélēs; [B] 384–322 BC) was an Ancient Greek philosopher and polymath.His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology, and the arts.