<p style="text-align:start;" size="0" _root="undefined" __ownerid="undefined" __hash="undefined" __altered="false">From the changes the Biden administration could bring to U.S. national security and defense contractors to the prospect of rising tensions with China and Iran and more grey zone conflicts, here are the issues that Forbes defense contributors expect to shape 2021.</p><p style="text-align:start;text-indent:2em;"></p>
