The National Flag of the United States of America, which is also the Ensign and the Merchant Flag, is known as "The Star-Spangled Banner", "Old Glory", or the "Stars and Stripes". The stars, white on blue, in the canton, represent the number of States forming the Union; this is now fifty, in nine alternate rows of six and five. The thirteen red and white stripes in the fly represent the original states from which the Union grew.
The U. S. Jack, sometimes called the "Union" and sometimes even the "Union Jack", is identical with the canton. The Warship Pennant bears seven stars, white on blue, at the head; for the rest of its length it is divided horizontally, red over white, and it ends in a long "swallow-tail".
The display of the Stars and Stripes is strictly regulated by the Flag Code. (See U.S. Flag Etiquette for some guidelines of the Code.) Except where for special reasons, as at the Capital, it is kept flying day and night, it is flown only during the hours of daylight. Solely as a signal of dire distress is it to be inverted. When the National flag is ceremonially paraded or hoisted or lowered, all present must face it and stand to attention: those in uniform salute, others place the right hand over the heart, men holding the hat in the right hand. Foreigners, however, should stand to attention. On suitable occasions the Pledge to the Flag is to be repeated:
"I pledge allegiance to the Flag of the United States of America and to the Republic for which it stands, one nation under God, indivisible, with liberty and
justice for all."