Check (pattern) a board used for playing checkers and chess, and in heraldry. The check pattern has a number of symbolic meanings. In auto racing, the chequered flag is displayed at the finishing line to signal that the race has finished. It originates from the "checkers" who watched the finishing line and checked when cars had finished the race. They began using chequered flags to identify themselves. In some countries, the check pattern has become a symbol of the police. Known as "Sillitoe Tartan", it was first used in Glasgow in the 1930s and was inspired by a pattern worn by some
Police reform in the United States 2015 and 2016 after various controversies, often involving issues of race and allegations of use of excessive force by officers. Chicago's chief was fired after a judge ordered the city to make a video public that showed the shooting of an individual by a police officer, and after public criticism of the city's handling of the video. Baltimore's chief was fired after a citizen died in police custody in controversial circumstances, riots after the death, and amidst a crime surge. After the 2016 shooting of multiple officers in Dallas, Texas during what had been a peaceful protest, there were reports