U.S. President Donald Trump signed an executive order on Thursday calling for an increase in the entrance fees paid by visitors to U.S. national parks from other countries.The additional revenue generated by higher fees from foreign tourists will raise hundreds of millions of dollars for conservation and deferred maintenance projects to improve national parks,

"We will be about America first. We're going to take it, America first for the national parks, and these are just a few of the many programs, initiatives, celebrations that will renew for our national pride,