Investigators probing a private jet crash which killed seven people including a newspaper magnate have recovered recording devices from the charred wreckage.
Tycoon Lewis Katz, 72, who was worth around $400m, was among the dead after a Gulfstream IV jet burst into flames as it plunged down an embankment in Massachusetts.
Three of the Philadelphia Inquirer co-owner's friends and three crew members were also killed in the crash, which happened as they were flying to New Jersey on Saturday.
It is hoped the retrieval of the flight data and cockpit voice recorders will provide clues as to how the plane hurtled off the runway and down an embankment.
Police in the area have also released dramatic calls made by members of the public alerting emergency services to the disaster.
In one, a female caller says: "Something just exploded. Fire. There’s fire... It was a big boom. It shook the house."
In another call, a male voice tells police: "I think there was an airplane crash... There’s a giant column of smoke and flames."
Mr Katz made his fortune investing in car parks and the New York Yankees' cable television network. He once owned the NBA's New Jersey Nets and the NHL's New Jersey Devils,and in 2012 became a minority investor in the Philadelphia Inquirer.
Last week, Mr Katz and Harold Lenfest struck a deal to gain full control of the Inquirer as well as the Philadelphia Daily News and Philly.com website by buying out their co-owners for $88 million.
The deal ended a very public feud over the Inquirer's business and journalism direction, and is still expected to go through, according to Mr Lenfest.
