President Vladimir V. Putin of Russia secured a fifth term with his highest-ever share of the vote, demonstrating his firm control. However, Russia experienced its deadliest terrorist attack in 20 years just days later. The assault killed at least 133 people at a concert hall in suburban Moscow, undermining Putin’s image as a leader prioritizing national security. The attack blindsided Putin, and his delayed response raised questions about his commitment to Russia’s security. The fact that he ignored a warning from the United States about a potential terrorist attack deepened skepticism. Critics cited his response as evidence of his detachment from Russia’s true security concerns. For more details, you can visit www.nytimes.com