Returning to the United States in 1990, Ehrmann continued writing on proliferation issues, sometimes collaborating with Christopher Barton at the Center for National Security Law at the University of Virginia. He also investigated and published articles in The Journal of Commerce and
The Christian Science Monitor discussing cooperation between Iraq and South American companies in connection with the Iraqi medium range guided missile program known as "Tammuz" in Iraq, and "Condor" in the West, and issues connected with the Nuclear Non-Proliferation Treaty (NPT) and the Missile Technology Control Regime (MTCR). ==Social media, Brazil and HuffPost==