WASHINGTON (AP) — The House has voted to open a gateway to citizenship for young Dreamers, immigrant farm workers and other migrants who fled to the U.S. from war or natural disasters abroad. Thursday's votes give Democrats wins in the year’s first votes on immigration. The issue faces a steep climb in the Senate because Republicans are demanding that immigration bills contain steps to toughen border security. One bill offers legal status to around 2 million Dreamers who were brought to the U.S. illegally as children, and to others. A second measure offers legal status to 1 million immigrant farm workers, about half the nation's agricultural labor force.

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LOOK: Stunning vintage photos capture the beauty of America's national parks

Today these parks are located throughout the country in 25 states and the U.S. Virgin Islands. The land encompassing them was either purchased or donated, though much of it had been inhabited by native people for thousands of years before the founding of the United States. These areas are protected and revered as educational resources about the natural world, and as spaces for exploration.

Keep scrolling for 50 vintage photos that show the beauty of America's national parks.