Will a bullet break through the cockpit window of an airplane?

A bullet can potentially break through the cockpit window of an airplane, but it depends on several factors, including the type of bullet, the velocity at which it's fired, and the specific design and materials of the cockpit window. Aviation cockpit Windows are typically made from multiple layers of reinforced glass and composite materials to withstand significant pressure and impact. While they are designed for durability, they may not be impervious to high-velocity projectiles. However, the likelihood of a bullet successfully penetrating and causing catastrophic failure is relatively low due to these safety features.