Assassin

Excerpt-The Aztlan ship had landed early that July morning, dropping silently through the overcast covering International Airport. It settled gently to rest precisely in the center of the junction of the three main runways of the field, effectively tying up the transcontinental and transoceanic traffic. Fully five hundred feet in diameter, the giant ship squatted massively on the runway junction, cracking and buckling the thick concrete runways under its enormous weight.