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All 19-year-old Maria Hernandez wanted to do was escort her grandparents, visiting from Puerto Rico, through a museum whose displays had so impressed her during her previous visit.

But their tour of the U.S. Holocaust Memorial Museum ended abruptly just before 1 p.m. Tuesday, as they were on the second floor.

"We were in the 'Remember the Children' exhibit. We were just exiting, and we heard shooting," Hernandez said. "I ran towards the glass doors to see what was going on. I thought it was a joke or something." Read full article »

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