In the waning days of the Trump administration, United States national security officials discovered that Chinese military hackers had breached the classified defense network of one of its most important security allies—Japan. In this week's bonus episode, Brett Bruen, the former Director of Global Engagement in President Obama’s White House speaks with The Washington Post's national security reporter Ellen Nakashima about her exclusive scoop documenting the hack, why it took Tokyo years to plug the network gaps, and what the Biden administration did behind-the-scenes to help Japan secure its cyber defenses.