339320
Control was provided by a three-axis autopilot ; radar reflector s and infrared flare s provided an assist in tracking the drone , and at the end of nine minutes ' flight time a self-destruct device would be activated .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None