NYC Shooting Has Security Experts Asking ‘What Else Can We Do?’

A deadly shooting at a New York City office tower on Monday exposed the vulnerability of corporate executives and employees even inside the commercial core of America’s financial capital, prompting reviews of security procedures at buildings across Manhattan.

At 345 Park Avenue, home to investment firm Blackstone Inc., consulting firm KPMG, building landlord Rudin Management Co. and the National Football League, an armed man opened fire in the lobby before taking an elevator to the 33rd floor and then turning his gun on himself. The shooting, about a half-mile from where a UnitedHealth Group Inc. executive was slain ...