Write about the national symbols of USA

The National Flag of the United States, also known as The Star-Spangled Banner is the official state symbol of the United States. It is a rectangular panel with seven red and six white horizontal stripes alternating. In the canton of dark blue - 50 five-pointed stars in white. 13 bands - 13 colonies, which formed an independent state. With the formation of the state, the colony became known as the States, and the number 13 was the common signs of all kinds of printing on bank notes or coins in the chop of symbols and signs. This is done in tribute to the first 13 uvekovechevaniya States of America. The blue rectangle on the left side symbolizes the Union.The number of stars in the blue field represents the number of states (currently there are 50).The red color symbolizes the endurance and valor.Dark blue - hard work, justice, vigilance.White - Innocence and purity. Aspect ratio of 19:10.Flag of the United States has changed over time, depending on the number of states that made up the Union. A new star added to flag 4 July, after entering into an alliance shtata.Kolichestvo new bands remained unchanged, the only exception - the flag of 1795-1818 years., When coupled with the two stars were added, and two bands (later removed).