Question: what aviation service operates based in Orlando,Florida that had an incident killing all seven people involved?

Context articles: National Airlines Flight 102
Aviation Section, U.S. Signal Corps
Suicide mission
Pulkovo Aviation Enterprise
European Business Aviation Association
Kansas Gas Service
1957 Pacoima mid-air collision
National Airlines (N8)
Route 47 (MTA Maryland)
United States Army Air Service

National Airlines Flight 102 was a cargo flight operated by National Airlines between the British military base Camp Bastion in Afghanistan and Al Maktoum Airport in Dubai, with a refueling stop at Bagram Airfield, Afghanistan.
 On 29 April 2013, the Boeing 747-400 operating the flight crashed moments after taking off from Bagram, killing all seven people on board.
The Aviation Section, Signal Corps, was the military aviation service of the United States Army from 1914 to 1918, and a direct statutory ancestor of the United States Air Force.
 It absorbed and replaced the Aeronautical Division, Signal Corps, and conducted the activities of Army aviation until World War I, when its statutory responsibilities were suspended for the duration of the war.
 The Aviation Section organized the first squadrons of the aviation arm and conducted the first military operations by United States aviation on foreign soil.
A suicide mission is a task which is so dangerous for the people involved that they are not expected to survive.
 The term is sometimes extended to include suicide attacks such as kamikaze and suicide bombings, where the people involved actively commit suicide during execution of the mission.
 The risks involved with suicide missions are not always apparent to those participating in them or to those who plan them.
 However, for an action to be considered a suicide mission someone involved must be aware of the risks.
 A mission that goes horribly wrong is not a suicide mission.
 An individual or group taking part in a mission may perceive the risks involved to be far greater than what they believe to be acceptable, while those planning or commanding the mission may think otherwise.
 These situations can often lead to refusals to participate in missions on the basis that they are "suicide missions".
 Similarly, planners or commanders may be well aware of the risks involved with missions while those participating in them may not.
Pulkovo Federal State Unified Aviation Service Company (ФГУАП “Пулково”) was an airline with its head office in Moskovsky District, Saint Petersburg, Russia.
 It operated the Pulkovo Airport and was 100% state owned.
 It was the third largest airline in Russia.
 On 29 October 2006 it completed a merger with government owned Federal State Unified Aviation Service Company to form a new company under the Rossiya name.
European Business Aviation Association or EBAA, is a non-profit association based in Belgium that has existed since 1977.
 Its 400 member companies span all aspects of the business aviation sector in Europe and elsewhere.
 The EBAA’s aim is to promote excellence and professionalism amongst its members and to ensure that business aviation is properly recognized as a vital sector of the European Economy.
 EBAA represents corporate operators, commercial operators, manufacturers, airports, fixed-base operators, and business aviation service providers.
Kansas Gas Service is the largest natural gas distribution company in the U.S. state of Kansas, operating in 82 counties.
 It is a regulated public utility which serves 634,000 customers in 360 communities, employing 1,000 employees.
 In addition to owning seven interstate pipeline connections and three intrastate pipeline connections, Kansas Gas Service operates 13,500 miles of service lines, pipelines and other natural gas properties.
 Headquartered in Overland Park, Kansas, the company was a division of ONEOK Inc., a Tulsa-based Fortune 200 company since 1997 until ONEOK spun off Kansas Gas Service and its two other distribution companies—Oklahoma Natural Gas Company and Texas Gas Service—to form ONE Gas in 2014.
On January 31, 1957, a Douglas DC-7B operated by Douglas Aircraft Company was involved in a mid-air collision with a United States Air Force Northrop F-89 Scorpion and crashed into the schoolyard of Pacoima Junior High School located in Pacoima, a suburb in the San Fernando Valley of Los Angeles, California.
 By February 1, seven people had died and at least 75 had been injured due to the incident.
 A 12-year-old boy subsequently died from multiple injuries from the incident on February 2.
National Air Cargo, also operating as National Airlines, is an American airline based in Orlando, Florida.
 It operates on-demand cargo and passenger charter services.
 It added scheduled passenger service on December 16, 2015, from its hub at Orlando-Sanford International Airport, Orlando.
Route 47 is a limited stop bus route, identified as a "Quickbus", operated by the Maryland Transit Administration in Baltimore.
 The line currently runs from the Overlea Loop in Northeast Baltimore to Walbrook Junction, in West Baltimore.
 Service operates every 15 minutes during rush hour only.
 The main roads on which it operates include Poplar Grove Street, Saratoga Street, Gay Street, and Belair Road.
 Service operates Monday–Friday, every 15 minutes, from 5:30 a.m.– 9:30 a.m. and 2:30 p.m.- 6:30 p.m.
The Air Service, United States Army (also known as the ""Air Service"", ""U.S. Air Service"" and after its legislative establishment in 1920, the ""U.S. Army Air Service"") was the military aviation service of the United States between 1918 and 1926 and a forerunner of the United States Air Force.
 It was established as an independent but temporary branch of the U.S. War Department during World War I by two executive orders of President Woodrow Wilson: on May 24, 1918, replacing the Aviation Section, Signal Corps as the nation's air force; and March 19, 1919, establishing a military Director of Air Service to control all aviation activities.
 Its life was extended for another year in July 1919, during which time Congress passed the legislation necessary to make it a permanent establishment.
 The National Defense Act of 1920 assigned the Air Service the status of "combatant arm of the line" of the United States Army with a major general in command.