As the gunfire raged in the hallway, Alex ducked behind a pillar, reloading his weapon with practiced precision. Sarah moved with lethal efficiency, picking off Vortex operatives with clean, controlled shots. Despite their skill, the enemy kept coming, waves of reinforcements determined to stop them.“Mia!” Alex barked over the noise. “How’s that door holding?”“It won’t hold much longer,” Mia replied, her fingers dancing across the tablet as she reinforced the locks. “I’m buying us time, but they’re going to breach it soon.”“Just keep them out,” Alex growled, firing another round as more hostiles rounded the corner.Inside the chamber, Marcus worked feverishly on the fusion device, his face tight with concentration. The core was volatile, its energy pulsing erratically as if responding to the chaos outside. He knew that one wrong move could set off a chain reaction.“I’ve got two more failsafes to disable,” Marcus muttered, sweat dripping from his forehead. “I just need a few more minutes!”“We don’t have minutes!” Sarah shouted, taking out another operative who had gotten too close. “They’re pushing hard.”Alex glanced at the countdown timer on the fusion device. Fifteen minutes remained before detonation.“Marcus, you need to speed it up,” Alex said, his voice tense. “If you can’t disarm it in time, we’ll have to evacuate.”“I’m almost there!” Marcus replied, his hands steady as he removed another security layer.Suddenly, an explosion rocked the hallway, and the metal door behind Mia buckled under the pressure.“They’re coming through!” she yelled.Alex exchanged a quick glance with Sarah. “We hold the line.”