Free admission to national parks June 21

NEW YORK (AP) — The National Park Service is offering free admission Tuesday to more than 100 national parks that usually charge entrance fees.

The fee-free day marks the first day of summer on June 21.

Other fee-free days remaining this year are Sept. 24, which is called Public Lands Day, and Nov. 11-13, Veterans Day weekend.

A complete list of national parks covered by the free entrance offer can be found at http://www.nps.gov/findapark/feefreeparksbystate.htm . The list includes many of the system's best-known parks, such as Grand Canyon in Arizona, Yosemite and Muir …