This document summarizes an analysis of ISIS Twitter activity. It identifies the problem of ISIS using Twitter to further its agenda and degrade the US, and the hypothesis that analyzing ISIS Twitter data can enhance understanding of their networks and tactics. It then describes collecting data from 10 self-identified jihadist Twitter accounts, performing network and text analytics on the data, and finding two distinct communities centered around British foreign fighters in Syria and information about Syrian Islamist groups. It concludes more data is needed but finds no correlation between US airstrikes and tweet volume except for one user, and that tweets generally contained religious statements or news about fighting in Syria.