["TECHNOLOGY & ENGINEERING \/ General","Lasers;Military applications;Research;United States;History.","Strategic Defense Initiative;History.","X-ray lasers;History.","GENERAL","General Adult","Lasers;Military applications;Research;United States;History.","Non-Fiction","SDI (STRATEGIC DEFENSE INITIATIVE)","Science\/Math","Strategic Defense Initiative;History.","TECHNOLOGY & ENGINEERING \/ General","United States","X-ray lasers;History."]