President Obama scrapped his predecessor’s proposed antiballistic missile shield in Eastern Europe on September 17, 2009 and ordered instead the development of a reconfigured system designed to shoot down short- and medium-range Iranian missiles. His decision relied heavily on research done at CISAC by David Holloway, Dean Wilkening, and Siegfried Hecker.

President Obama's announcement to drop a planned missile defense system in eastern Europe follows the recommendations of a recent report written in part by CISAC's David Holloway and Siegfried Hecker. The report, "Iran's Nuclear and Missile Potential: A Joint Threat Assessment by U.S. and Russian Technical Experts" concludes there is no immediate threat of an intermediate-range or intercontinental ballistic missile being launched by Iran. The EastWest Institute, a global think tank, published the report in May. Dean Wilkening's missile defense research also supported those findings. Wilkening had been advising the administration on the issue and persuaded them that technical considerations did not make Poland and the Czech Republic the most effective sites for the missile defense system.

A study by Russian and U.S. scientists published in May by the East-West Institute, an international think tank, downplayed the progress of Iran's long-range-missile program.
 - Wall Street Journal, 9/17/09

The Obama team relied heavily on research by a Stanford University physicist, Dean Wilkening, who presented the government with research in 2009 arguing that Poland and the Czech Republic were not the most effective places to station a missile defense system against the most likely Iranian threat. Instead, he said, more optimal places to station missiles and radar systems would be in Turkey or the Balkans.
The New York Times, September 17, 2009