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Visitors at the gift shop in Yosemite Village discuss the name changes and take advantage of items at half price as the concessionaire change from Delaware North to Aramark Monday, Feb. 29, 2916 in Yosemite Valley, Yosemite National Park.
Visitors at the gift shop in Yosemite Village discuss the name changes and take advantage of items at half price as the concessionaire change from Delaware North to Aramark Monday, Feb. 29, 2916 in Yosemite Valley, Yosemite National Park.

U.S. steps up fight over Yosemite names, asking trademarks be canceled

March 18, 2016 10:26 AM

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Florida high school students march 13 miles to school shooting scene, demand change 0:32

Florida high school students march 13 miles to school shooting scene, demand change

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Parkland school mass shooter Nikolas Cruz makes first live court appearance

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Student reporter interviews classmates hiding from gunman in Florida high school

Here's what we know about Nikolas Cruz, school shooting suspect 1:06

Here's what we know about Nikolas Cruz, school shooting suspect

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The Florida high school shooting in photos

Florida shooting suspect arrives at Broward Health North through back entrance 2:16

Florida shooting suspect arrives at Broward Health North through back entrance

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This passer-by video shows arrest of Florida school shooting suspect

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AR-15: The gun behind so many mass shootings

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Coast Guard shows 14,000 pounds of cocaine seized in South Florida

Shooting reported near Fort Meade NSA campus 1:13

Shooting reported near Fort Meade NSA campus