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Hillary Harris spent years searching the internet to find Dawn Johnson — until fate stepped in, in a big way.

Adopted as a baby, Harris only found out she had a half-sister after reading her adoption file as an adult. There, she discovered that her sibling’s name was Dawn Johnson.

For years, Hillary trawled the internet, and hundreds of Facebook pages hoping to find any Dawn Johnsons who might look like her, but found no one.

Last year, the 50-year-old was amused when, coincidentally, a woman named Dawn moved next door to their home in Eau Claire, Wisconsin. She joked to her husband that the new neighbor—even though she was 20 years younger—was her long-lost sister.

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“I’m, like, Lance! Her name is Dawn!” Hillary told The Washington Post. “He was, like, ‘No’.”

They had a good laugh, but Hillary was still curious, and couldn’t shake the feeling that it might be her. After months of peering through the window to catch glimpses of the…