The New York City office building that was the site of a mass shooting Monday had significant security measures in place.

A shooting Monday at an office building in New York City that is home to the Blackstone investment firm and the NFL left four people dead, including an NYPD officer.

Businesses around the country are reevaluating security after a brazen shooting at a New York City office building raised questions about what it takes to keep workplaces safe. The attack on a seemingly secure building — in a gilded part of Manhattan where the rich live in sprawling apartments and tourists window-shop designer