The Midtown Manhattan building that was the scene of a deadly shooting last week reopened Monday, but under very different circumstances. The building at 345 Park Ave. was once filled with the everyday buzz of office life,

A gunman opened fire inside the Manhattan skyscraper that is the headquarters of private-equity firm Blackstone and the NFL, killing four people, including a police officer, before fatally shooting himself on Monday evening, authorities said. Another person was in critical condition, and others suffered less serious injuries.