5 Things To Know Today: Thursday, April 12

• There's a book discussion at the this morning, starting at 10:30 a.m. The book? Room by Emma Donoghue.

• The Weston Sustainability Committee meets tonight at 7 p.m. in the community room at the Weston Public Library.

• On this day in 1945, President Franklin Delano Roosevelt died in office. Vice President Harry S Truman was then sworn in. 

• On this day in 1955, the first polio vaccine, developed by Jonas Salk, is pronounced ready. 

• Happy 72nd birthday to musician Herbie Hancock and happy 65th birthday to television host David Letterman.