U.S. Navy Adm. Mike Mullen, Chairman of the Joint Chiefs of Staff, has arrived in Pakistan to meet with Pakistani leaders and U.S. Embassy officials, the U.S. embassy said Saturday. Sources said that Mike Mullen's visit is aimed at taking into confidence the Pakistani political and military leadership about the sacking of top U.S. commander in Afghanistan, General Stanley McChrystal. McChrystal was sacked by U.S. President Obama for making derogatory remarks about Obama and his team in a magazine interview. While in Pakistan, Mullen is scheduled to meet with Pakistan President Asif Ali Zardari, Gen. Ashfaq Parvez Kayani, Chief of Army Staff, and Air Chief Marshal Rao Qamar Suleman, a statement from the U.S. embassy said. The U.S Admiral arrived in Islamabad after he traveled to Afghanistan to assure Afghan leaders that there will be no change in the U.S. policy after the removal of General McChrystal. U.S. Vice President Joe Biden had called Zardari and Pakistani Prime Minister Yusuf Raza Gilani to take them into confidence about the change of command in Afghanistan. Meanwhile U.S. Air Force Gen. Norton Schwartz, U.S. Air Force Chief of Staff, visited the Pakistan Air Force (PAF) Headquarters here Friday and met with Suleman and other senior PAF officials, another U.S embassy statement said. 