sentences:  Helicarrier, only to discover that the entire base has been infiltrated by Skrulls.After defeating the Skrulls, the heroes meet with S.W.O.R.D., who escort them to the real Nick Fury's base in an abandoned toolshed in Madripoor.From there, the heroes combat Skrull activity throughout the world until discovering that the leader of the invasion, Kl'rt the Super-Skrull, has established his primary base in Madripoor's Hightown.