Somali government soldiers run to position during an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY CIVIL UNREST POLITICS) 

Somali government soldiers run to position during an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY CIVIL UNREST POLITICS) 

Somali government soldiers run to position during an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY CIVIL UNREST POLITICS) 

Somali government soldiers run to position during an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY CIVIL UNREST POLITICS) 

Somali government soldiers run to position during an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY CIVIL UNREST POLITICS) 

Somali government soldiers open fire during an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY CIVIL UNREST POLITICS TPX IMAGES OF THE DAY) 

Somali government soldiers drive a convoy of tanks towards Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: SOCIETY CIVIL UNREST POLITICS) 

Somali government soldiers drive on a convoy after an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY CIVIL UNREST POLITICS) 

Ugandan soldiers serving in African Union Mission in Somalia (AMISOM) open fire during an ambush by al Shabaab rebels on the outskirts of Elasha town May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: CIVIL UNREST POLITICS MILITARY) 

Somalia's President Sheikh Sharif Ahmed (L) visits the former rebel stronghold of Afgoye northwest of Mogadishu, May 29, 2012. Somalia's al Shabaab rebels ambushed an armoured convoy carrying the President Sheikh Sharif Ahmed during a rare overland trip outside the capital on Tuesday, a Reuters witness said. President Ahmed was unharmed in the attack which occurred on the outskirts of Elasha town, located between Mogadishu and the former rebel stronghold of Afgoye, about 30 km (18 miles) northwest of the city. REUTERS/Feisal Omar (SOMALIA - Tags: MILITARY POLITICS CIVIL UNREST)