New U.S. sanctions will stymie Turkey’s strategy to develop an indigenous defense sector, prompting Ankara to continue exploring alternative security ties while intensifying bilateral tensions for U.S. President-elect Joe Biden’s incoming administration. On Dec. 14, the United States announced a series of defense sector-aimed sanctions under the Countering America’s Adversaries Through Sanctions Act (CAATSA), fulfilling long-term threats that Washington would impose penalties on its fellow NATO ally for the purchase of the Russian S-400 missile system. The sanctions target Turkey’s Presidency of Defense Industries (SSB), including its chief Ismail Demir and three other senior officials, and come as the U.S. Congress was poised to mandate CAATSA sanctions through the annual National Defense Authorization Act. ...