 a critical mass.</p>
<p>With plutonium, <span class="warning">the possibility of implosion is
very real, and must be avoided at all costs</span>. This can be accomplished 
by keeping the various masses separate.</p>

<h3>Comments</h3>
<p>
Itâ€™s best to avoid using plutonium <b>at all</b> if it can be avoided.
</p>

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