Tuesday was a devastating day in Louisville after a UPS plane crashed during takeoff. Here is everything we know so far and everything we do not.

As chief commercial officer, Guffey is responsible for accelerating UPS’s profitability and growth. He acknowledges that innovation is a cultural challenge inside a large organization approaching its 120th anniversary. UPS’s approach to modernization often reveals the tension between transformation and legacy.

Investigators are reviewing 63 hours of data collected from the black box of a UPS cargo plane involved in a deadly crash that killed at least 13 people in Louisville, Kentucky, earlier this week. Nine people remain missing as authorities sift through the wreckage of Tuesday's crash in an attempt to piece together what went wrong.

The deceased are believed to include the three people aboard the plane, who were identified Thursday by UPS as Capt. Richard Wartenberg, First Officer Lee Truitt and International Relief Officer Capt. Dana Diamond.

Officials in Louisville, Kentucky, believe the total number of people killed after a UPS plane crashed in a ball of flames earlier this week will stand at 14.

Former colleagues are mourning three pilots killed in the UPS cargo plane crash near the Louisville, Kentucky, airport, as relatives of a badly burned man who was pulled from the wreckage confirm he’s also among the 14 who died.

Following the crash, UPS decided to temporarily take the MD-11 out of service. This was done “out of an abundance of caution and in the interest of safety,” UPS said in a statement. The company “made this decision proactively at the recommendation of the aircraft manufacturer.

The sister of one of the victims of Tuesday’s UPS cargo plane crash in Louisville confirmed in a Thursday Facebook post he had died from his injuries. Regarding her brother Matt Sweets, Michelle Sweets wrote, “It is with the heaviest heart, I regret to inform all of you that he passed away this afternoon after fighting his hardest in the ICU. “

UPS said it is temporarily grounding part of its fleet of aircraft after a cargo plane crashed into a ball of flames shortly after taking off from Louisville Muhammad Ali International Airport in Kentucky earlier this week.