Kenneth Pollack, the director of research at the Saban Centre for Middle East Policy of the Brookings Institution, has also expressed doubt about the official argument for escalation in Afghanistan.
Local officials say this escalation is in response to successful reconstruction efforts by the district government and Canadian aid officials, who have organized a wide range of rural development and cash-for-work programs.
The letter, by two cabinet-rank officials, represents an escalation of the concern over the software plan.
American officials said the escalation was the result of two factors: an attempt to disrupt militant networks that attacked American troops in Afghanistan, and efforts to strike militant cells in Pakistan that might be coordinating terrorist plots in Europe.
A wave of Israeli F-16 warplanes struck a Palestinian security compound in Gaza City today after a Palestinian rocket attack on Sunday that Israeli officials called an escalation in the conflict.
A recent escalation in official efforts to stem the influence of Western political thinking on Chinese campuses should only fire ambitions to leave.
In the Sunday attack, at least two suicide bombers detonated cars close to the post, just west of Zinjibar, and other militants then mounted mortar attacks in what one Yemeni official called a major escalation in the conflict.
The United States will consider a full range of options in response, but they would be calibrated to show U.S. resolve while avoiding escalation, the official added.
Their search warrant, federal officials said, represented an escalation over a voluntary search conducted months earlier.
The federal warrant for the Aug. 1 search of Dr. Hatfill's apartment in Frederick, Md., officials said, represented an escalation over a voluntary search conducted earlier this year.
