Video released Thursday by the National Transportation Safety Board shows the intense flames firefighters faced when 38 rail cars went off a track in East Palestine, a village in northeast Ohio."There was incredibly hot, active fire for several hours," said hazardous materials expert Drew McCarty.Four months after February's derailment, NTSB officials are conducting what they're calling a rare investigative field hearing.Sworn witnesses are testifying before the public. They're describing how the derailment happened and critical takeaways from the incident."Lots of lessons learned," Keith Drabick said.Drabick is the chief of East Palestine's mostly volunteer fire department. He remains concerned about conditions his fellow firefighters encountered in the wake of the train wreck — and a controlled burn that sent hazardous chemicals high into the sky."I'm concerned about not only my responders but everybody around for long-term health concerns," he said. "It's got to weigh in the back of your head for everybody."To better prepare for another possible hazmat incident, Drabick said training opportunities need to be expanded."Standards need to change in the country. Standards need to change in our village," Drabick said.In Cincinnati, training is a priority because the city is home to huge rail yards."There are a lot of people working behind the scenes, keeping our area prepared for any type of emergency that may occur," said Doug Witsken.Witsken coordinates emergency planning for Hamilton County's Emergency Management Agency. He's among those eager to learn more from the hearing in East Palestine." I expect in coming years we will get a lot more detailed information about the incident, about how it was managed, lessons learned," Witsken said.The focus of day one of the hearing in East Palestine was on the way first responders handled the derailment and how the decision to do a controlled burn was made.The second day of the hearing on Friday will center around the Norfolk Southern rail cars that crashed and the hazardous materials they carried.

A fatal plane crash in Watertown, Wisconsin, claimed the lives of a 73-year-old pilot and his 8-year-old grandson joining him for a flight up to northern Wisconsin.Summit View Elementary School sent a letter to inform families about the tragic loss of student Colin Strebe on June 14 due to an accident.The aircraft plunged into a grove of trees at Brandt Quirk Park near a residential area on Wednesday at approximately 9 a.m. Investigators spent much of Thursday at the site, where pieces of the wreckage were spread across the soccer field.The National Transportation Safety Board and the Federal Aviation Administration were at the airport hangar to examine the evidence. According to reports from Federal Aviation Administration, the plane had just taken off from the Municipal Airport about 3 miles from the accident site. Sources say the flight was planned to Manitowish Waters.Investigators will collect as much information as they can from witnesses, and the wreckage itself, to determine, if they can, what led to this family tragedy in Watertown.Watertown police department said the Brandt Quirk Park would remain closed through the weekend for site cleanup.Police have yet to identify the victims, officially saying only that there were two victims. The pilot is from Watertown, and his grandson is from Waukesha.The FAA and National Transportation Board will lead the investigation. WATCH: Scary moment for Watertown neighbors who heard and 'felt' the plane crashTOP STORIESHungry bear eats employee's lunch in company truckFox Point pool will be closed for the summerCheap Trick cancels Summerfest performance