25 of 27: Friends Rose Louese Mayr, a nursing student at the University of Delaware and Elizabeth Conway Nass, a student at James Madison University in central Virginia, were killed in a train derailment in Ellicott City, Maryland. Their bodies were found buried under coal dumped from the train cars. Tweets and photos from the two 19-year-old college students chronicled some of their final moments together. "Drinking on top of the Ellicott City sign," read one tweet. "Levitating" read another.

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