This document proposes additional funding for counterterrorism intelligence and cooperation between the FBI, CBP, and ICE. It recommends a "triangular information network" where the agencies share intelligence to identify potential threats at borders and within the US in a proactive manner. Currently, counterterrorism efforts are too reactive; improved information sharing and watchlists could help intercept individuals earlier. The proposal analyzes historical terrorism cases like the Boston Marathon bombing to argue for more proactive domestic counterterrorism strategies.