More collaboration with foreign partners is needed, but that might be easier said than done, Dr. Weinstein said during a trip to Atlanta to speak at the annual AmCham Germany Business Day event organized by BridgehouseLaw at the Porsche Experience Center.

But to address threats posed by new actors armed with better technologies, both strategic competitors like Russia and China and asymmetrical actors like ISIS and al-Qaeda, the U.S. needs to work with its allies to move more nimbly to find cheaper and more effective solutions more quickly.