Explanation: Contrasts are created from engine water vapor; Solid-fueled missile trails can carry aluminum oxide Solid-fueled missile trails can appear as dense white or gray smoke, and cruise missiles with solid-fuel boosters may produce smoke during initial acceleration.

Explanation: Contrasts are created from engine water vapor; Solid-fueled missile trails can carry aluminum oxide Solid-fueled missile trails can appear as dense white or gray smoke, and cruise missiles with solid-fuel boosters may produce smoke during initial acceleration.