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The National Football League makes helmets mandatory.
Related Wikipedia articles
National Football League
Professional American football league
The National Football League (NFL) is a professional American football league in the United States. Composed of 32 teams, it is divided equally between the American Football Conference (AFC) and the National Football Conference (NFC). The NFL is one of the major professional…Source: Wikipedia (CC BY-SA)
Football helmet
Protective equipment
A football helmet is a type of protective headgear used mainly in gridiron football, although a structural variation has occasional use in Australian rules football. It consists of a hard plastic shell with thick padding on the inside, a face mask made of one or more…Source: Wikipedia (CC BY-SA)
April 7
Day of the year
April 7 is the 97th day of the year in the Gregorian calendar; 268 days remain until the end of the year.Source: Wikipedia (CC BY-SA)