Milestones

DIED

Raymond Tomlinson, 74, computer programmer and inventor of modern email, who first used the @ symbol to separate user names from server addresses. Tomlinson said in 2012 he chose the now iconic sign purely because “it denoted where the user was … at.”

Pat Conroy, 70, author of The Prince of Tides, The Great Santini and The Lords of Discipline. His works were inspired by his abusive father and his time in South Carolina.

Elizabeth Garrett, 52, Cornell University’s first female president, of cancer, just eight months into the job.

OPENED

The world’s most expensive train station, in downtown Manhattan. The $4 billion World Trade Center Transportation Hub, designed by Santiago Calatrava, ended up costing about twice its original budget and opened seven years late.

RETIRED

Peyton Manning, 39, one of the greatest NFL quarterbacks, one month after leading the Denver Broncos to victory in Super Bowl 50. Over his 18-year career, he was known for setting league records for passing yards and touchdown passes, as well as for his rivalry with New England Patriots quarterback Tom Brady.