Four years after the Jan. 6 riot at the Capitol, Donald Trump and his supporters have worked to redefine the events of that day, spreading conspiracy theories and turning violent rioters into martyrs. Now, Trump plans to further spin the attack and has vowed to pardon rioters in his new administration. Meanwhile, Russia and other hostile states are increasingly using hybrid tactics, such as hacking and surveillance drones, to target Western countries. Defense officials face the challenge of deterring such acts without starting a broader conflict and assigning blame when the strikes are designed to evade culpability.