Ah, I see now that my parent's sources list it as "largest debris-generating event" (celestrak) and "The test is the largest recorded creation of space debris i

Ah, I see now that my parent's sources list it as "largest debris-generating event" (celestrak) and "The test is the largest recorded creation of space debris in history with at least 2,317 pieces of trackable size (golf ball size and larger) and an estimated 150,000 debris particles." (wikipedia). That tracks with what I saw, so take this as just a minor tweak to GP's phrasing. Don't skip that post because of the oversight. The celestrak link offers an incredible HD video simulating the debris cloud and the path of the ISS... it's like an action movie. Great find, so I upvoted.