THE MOTLEY FOOL The Inquirer Business Weekly Newsletter Business news and analysis sent straight to your inbox every Tuesday morning. Sign Up The Inquirer Business Weekly Newsletter We Recommend Tech to protect children from school shootings? Medical school dropout’s Manayunk startup is on it Diane Mastrull ‘Stay the Course’: John Bogle rates his Vanguard CEO successors Joseph N. DiStefano Bankrupt Performance Bicycle starts store-closing sales; Philly warehouse gets layoff warning Joseph N. DiStefano Pa.’s first sports-betting casino attracts a younger crowd Andrew Maykuth Pennsbury schools will reopen Monday, but boil-water alert remains in force Andrew Maykuth Archdiocese of Philadelphia closes three former parish sites Andrew Maykuth We Recommend