Ten kilos of HEU may or may not be a concern, it&#x27;s hard to say and I don&#x27;t see the actual enrichment in the article. &quot;Highly enriched&quot; means any enrichment above 20% enrichment but below &quot;weapons grade&quot; (85%). It usually means something close to 20%... 10 kg of 20% enriched is scary but is a small fraction of what you need to make a bomb, so while it&#x27;s scary it isn&#x27;t necessarily that some terrorist group almost bought a pit for a bomb. I expect that has something to do with the apparently light sentence.