A Cold War anecdote about Lego in minefields

One panelist recounts a proposal within NATO to scatter Lego bricks alongside rocket-dispersed mines. The intended effect was to hurt engineers' hands while they crawled through a minefield to clear it, even though soldiers crossing on foot would be wearing boots. The account says the idea stopped because planners could not agree on the most effective brick shape. A later explanation mentions perceived legal questions around caltrops and suggests that extra Lego orders would disappear within the scale of civilian production. Another panelist adds that plastic pieces would avoid the metal-detection problem of metal caltrops. These details are presented as an anecdote without a supporting document or date.