Half a Dollar

I got this one as change to my ferry ride between VT and NY
The Half Dollar of the United States, sometimes known as the fifty-cent piece, has been produced nearly every year since the inception of the United States Mint in 1794. The only U.S. coin that has been minted on a more consistent basis is the penny. However, the half dollar's circulation, aside from use in some casinos and movie theaters, has declined significantly.
This is primarily due to a confluence of two events: the silver crisis of 1963, and the assassination of U.S. President John F. Kennedy. The Kennedy half-dollar design, however, continued to be minted in a 40% silver-clad composition from 1965–1970.