Summer brings not only crowds to Yellowstone National Park, but also road work, and that means visitors should prepare to encounter delays in some areas of the park.

Three fatalities, one in Hawai'i Volcanoes National Park, one in Great Smoky Mountains National Park, and a third in Zion National Park in recent days drive home the message to be careful when you're on your national park vacation. The death at Hawai'i Volcanoes was tied to a vehicle accident, the one at Great Smoky involved a man falling from the top of the Ramsey Cascades waterfall, and in Zion a man possibly fell to his death from an arch.

This year marks the 175th anniversary of Fort Scott, which was established in the Kansas Territory in 1842. In commemoration of this momentous occasion, Fort Scott National Historic Site is pulling out all the stops with frontier-era military reenactments on Saturday.

President Trump's decision Thursday to have the United States exit the Paris Accord on climate change sent shivers through the nation's conservation community, but it remained to be seen how that action might impact the National Park System.