Terrorists planning summer attack!

The intelligence was described Tuesday by a senior counter-terrorism official on condition of anonymity as extremely credible and backed by an unusually high level of corroboration.

The intelligence does not include a time, place or method of attack but is among the most disturbing received by the government since the al-Qaeda attacks of Sept. 11, 2001, the official said.

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"There is clearly a steady drumbeat of information that they are going to attack and hit us hard," the official said.