Video of Taliban fighters loyal to Baitullah Mehsud train at a makeshift camp in the village of Karwan Manza in South Waziristan

The US killed 14 Taliban fighters in the latest airstrike in Pakistan's Taliban-ruled tribal agency of South Waziristan.

Unmanned US Predator strike aircraft struck a Taliban training camp in the village of Zangra in the Ladha region, an area controlled by Baitullah Mehsud.

Today's Predator strike takes place as the Pakistani military is in the opening phase of its operation to destroy Baitullah's network in South Waziristan. The military has conducted air and artillery attacks to soften up Taliban positions and in late June was reported to be moving ground troops forward while working to secure the main road in the tribal agency. The military has been bombing Taliban positions and conducting artillery strikes for over three weeks.

The Pakistani military has delayed the launching of the ground operation, and senior Taliban leaders are believed to have fled the region in anticipation of the attack. Baitullah is rumored to have left South Waziristan and is said to be sheltering in Mir Ali in neighboring North Waziristan, under the care of Taliban leader Hafiz Gul Bahadar, who has ended his peace agreement with the government.

Today's strikes are the third this week. A pair of Predator strikes on Taliban camps in South Waziristan July 3 killed 13 Taliban fighters, according to reports from the region.

The US took aim at the senior Taliban and a Qaeda leadership in South Waziristan late last month when US Predators killed a mid-level Taliban commander loyal to Baitullah Mehsud on June 23, then followed up with an attack on his funeral procession that same day.

The second strike on June 23 killed 83 Taliban fighters and civilians, according to reports. Along with Baitullah, Qari Hussain Mehsud, a senior commander in Baitullah's network, and Mullah Sangeen Zadran, a field commander in the Haqqani Network in Afghanistan, were the targets of the June 23 strikes. The three Taliban leaders survived the attack.

One week earlier, the US launched a flurry of Predator strikes in South Waziristan that coincided with an important meeting between Baitullah and a senior delegation of Taliban and al Qaeda leaders to discuss the military's operation in South Waziristan. Among those in attendance were Siraj Haqqani, Abu Yahya al Libi, Abdul Haq, and two senior deputies of Mullah Abdullah Zakir. The US appears to have targeted al Qaeda’s senior leadership as it met with Baitullah.

South Waziristan is a major focus of the US air campaign against al Qaeda and the Taliban. Of the 27 US strikes carried out in Pakistan this year, 19 of them took place in South Waziristan. Baitullah Mehsud's territory has been hit 11 times and Mullah Nazir's areas have been hit eight times. Both Nazir and Baitullah host al Qaeda training camps and shelter senior leaders of the terror group. Six of the last eight attacks have targeted Baitullah's camps.

The US is well on its way to exceeding last year's total of 36 airstrikes in Pakistan.

Background on US strikes against al Qaeda and Taliban networks in northwestern Pakistan

US intelligence believes that al Qaeda has reconstituted its external operations network in Pakistan's lawless, Taliban-controlled tribal areas. This network is tasked with hitting targets in the West, India, and elsewhere. The US has struck at these external cells using unmanned Predator aircraft and other means in an effort to disrupt al Qaeda's external network and decapitate the leadership. The US has also targeted al Qaeda-linked Taliban fighters operating in Afghanistan, particularly the notorious Haqqani Network.

As of last summer, al Qaeda and the Taliban operated 157 known training camps in the tribal areas and the Northwest Frontier Province. Al Qaeda has been training terrorists holding Western passports to conduct attacks, US intelligence officials have told The Long War Journal. Some of the camps are devoted to training the Taliban's military arm; some train suicide bombers for attacks in Pakistan and Afghanistan; some focus on training the various Kashmiri terror groups; some train al Qaeda operatives for attacks in the West; some train the Lashkar al Zil, al Qaeda's Shadow Army; and one serves as a training ground for the Black Guard, the elite bodyguard for Osama bin Laden, Ayman al Zawahiri, and other senior al Qaeda leaders.

There were 36 recorded cross-border attacks and attempts in Pakistan during 2008, according to numbers compiled by The Long War Journal. Twenty-nine of those attacks took place after Aug. 31. There were only 10 recorded strikes in 2006 and 2007 combined.

During 2008, the US strikes inside Pakistan's tribal areas killed five senior al Qaeda leaders. All of the leaders were involved in supporting al Qaeda's external operations directed at the West.

Abu Laith al Libi, a senior military commander in Afghanistan, was killed in a strike in North Waziristan in January 2008.

Abu Sulayman Jazairi, al Qaeda’s external operations chief, was killed in a strike in Bajaur in March 2008.

Abu Khabab al Masri, al Qaeda's weapons of mass destruction chief, and several senior members of his staff were killed in a strike in South Waziristan in July 2008.

Khalid Habib, the leader of al Qaeda's paramilitary Shadow Army, was killed in a region controlled by Baitullah Mehsud in South Waziristan in October 2008.

Abu Jihad al Masri, the leader of the Egyptian Islamic Group and a member of al Qaeda's top council, was killed in North Waziristan in October 2008.

In 2009, US strikes have killed two senior, long-time al Qaeda leaders. Osama al Kini and his senior aide, Sheikh Ahmed Salim Swedan, were killed in a New Year's Day strike in South Waziristan. Kini was al Qaeda operations chief in Pakistan. Both men were behind the 1998 bombings of the US embassies in Dar es Salaam, Tanzania; and Nairobi, Kenya, which killed 224 civilians and wounded more than 5,000 others.