The message was sent to Nasir al-Wuhayshi , the leader of al Qaeda in the Arabian Peninsula , the terror group 's Yemeni affiliate . Sources : Britain withdraws troops from British embassy in Yemen , follows U.S. lead . Sources : Members of al Qaeda in the Arabian Peninsula are planning an attack . The United States has tightened its security measures across the Mideast and Africa . Al Qaeda leader Ayman al - Zawahiri tells operatives in Yemen to ` ` do something ''
Sources : Britain withdraws troops from British embassy in Yemen , follows U.S. lead . Sources : Members of al Qaeda in the Arabian Peninsula are planning an attack . The United States has tightened its security measures across the Mideast and Africa . Al Qaeda leader Ayman al - Zawahiri tells operatives in Yemen to ` ` do something ''