Everly, 14, and Alydia, 11, died in a midair collision over the Potomac River, along with their parents, Donna and Peter Livingston, of Virginia. NBC Universal, Inc. It was the only house in the ...

For five years, Everly had longed for a sibling. Her mom, Taylor Johnson, had faced challenges conceiving another child. She called Emily her "special girl" and thought having a second child was ...