1.   He said the focus of American bombing runs included caves and tunnel complexes used by the Taliban and al-Qaida.

2.   One such practice mission, involving members of Delta Force, took place at an underground tunnel complex in Nevada operated by the Energy Department for nuclear weapons tests.

3.   Shelter officials said that a recent group of Afghans who tried to enter the tunnel complex on their own were turned away at knife point by smugglers.

4.   Shelter officials have said groups that tried to enter the tunnel complex on their own have been turned away at knife point by smugglers.

5.   After taking the base Sunday, soldiers searched a tunnel complex in the mountain base.

6.   An Associated Press team that visited a Taliban tunnel complex near the compound Monday saw a tripwire attached to a grenade lodged in the rubble of one entrance.

7.   Meanwhile, rescue workers and family members said militants killed six youths they lured into a tunnel complex used by the group, known as the GIA.

8.   Meanwhile, American warplanes bombed the remote mountains around the Tora Bora cave and tunnel complex where locals believe bin Laden could be hiding.

9.   On Wednesday the two discussed findings made by U.S. experts during an inspection last month of a North Korean underground tunnel complex suspected of being a nuclear weapons facility.

10.   The two on Wednesday had discussed findings by U.S. experts during an inspection last month of a North Korean underground tunnel complex suspected of being a nuclear weapons facility.