FIGURE 3-1 Notional ICBM trajectories from Iran to U.S. East Coast.

a GBX version, described in Chapter 4, would be required at that location. Another potential alternative being considered by MDA would be a version of the airborne infrared (ABIR) unmanned system flying combat air patrol, perhaps over the eastern Black Sea. Cost should be a strong consideration in the event an alternative to the forward-based radar is needed.

The committee’s analysis suggested that any long-range missiles would likely be based deeper in the heartland of Iran, near Yazd, while shorter range missiles would be based near Tabriz. The basing of ICBMs or MRBMs in silos near Qom raises a question about the value of an Aegis ship in the Black Sea. The committee set aside the obvious operations issues of maintaining an Aegis ship in the southeastern Black Sea in examining engagement effectiveness (see classified Appendix J for greater detail).

Defense of Deployed Forces and U.S. Allies, Partners, and Host Nations

Deployed Forces: Aegis, PAC-3, and THAAD Systems

Against short- and medium-range threats, Aegis, THAAD, and PAC-3 are well developed and suited to their individual missions (e.g., defending deployed forces), but there has been limited interface among them. More attention is needed to the exchange of data and hardware among these systems to take full advantage of the large investment already made in the form of both procurement and operating costs. The newly awarded integrated battle command system

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