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(CNN) — The partial US government shutdown raises all sorts of questions for travelers on topics from aviation safety and security to passports and national parks. Here's where things stand on travel :. MANY NATIONAL PARKS OPEN BUT WITH LIMITED FACILITIES. Although National Park Service sites across the country have been closed during previous government shutdowns, many have remained open -- but severely understaffed -- under the Trump administration. Some park sites have been operating for weeks without park service-provided visitor services such as restrooms, trash collection, facilities or road maintenance. More than 40 parks have been able to continue to offer key services for visitors,... Full story

18 January