For the second straight day Friday, U.S. warplanes struck a suspected al-Qaida terrorist base near Afghanistan's eastern border with Pakistan.
Pentagon spokeswoman Victoria Clarke said further activity was detected at the site where terrorist fighters were believed to be regrouping.
"There was some activity observed and they decided to go in and restrike it," she said.
There is no immediate assessment of damage at the sprawling facility, which included a training area and cave complex.
It is the same camp hit by U.S. cruise missiles in 1998 in retaliation for the 1998 terrorist bombings of U.S. embassies in East Africa.