ISLAMABAD, Pakistan - One of al-Qaida's top five leaders, said to be responsible for planning overseas strikes, was killed by Pakistani security forces in a rocket attack near the Afghan border with U.S. help, American and Pakistani officials said Saturday. Hamza Rabia, a key associate of al-Qaida No. 2 Ayman al-Zawahri, died Thursday in an explosion in the North Waziristan tribal area, and his remains were identified in DNA tests, Information Minister Sheikh Rashid Ahmed said. Two U.S. counterterrorism officials, who spoke only on condition of anonymity because of the information's sensitivity, confirmed Rabia's death but would not elaborate on...