Two years of strife in Syria

Two years into the uprising against Syrian President Bashar Assad, the conflict wages a heavy toll on the nation's people.

In this photo, Ahmed, center, mourns his father Abdulaziz Abu Ahmed Khrer, who was killed by a Syrian Army sniper, during his funeral in Idlib, north Syria, March 8, 2012.

Read more about the anniversary of the Syrian uprising here

A rebel sniper aims at a Syrian army position in a residential building in the Jedida district of Aleppo, Syria, Oct. 29, 2012.

Syrian rebels attend a training session in Maaret Ikhwan, near Idlib, Syria, Dec. 17, 2012.

Injured Syrian women arrive at a field hospital after an air strike hit their homes in the town of Azaz, on the outskirts of Aleppo, Syria, Aug. 15, 2012.

A wounded child is treated in a makeshift hospital in Aleppo after her home was randomly targeted by the Syrian regime's artillery, March 15, 2013.

Syrian rebel fighters belonging to the Liwa Al Tawhid unit pose for photo in the Karmal Jabl neighborhood after several days of intense clashes in Aleppo, Syria, Oct. 25, 2012.

A wounded Syrian civilian lies in the street with a shot to his stomach as he tries to escape the line-of-fire after he was targeted by a Syrian army sniper while walking near the frontline in the Bustan al-Qasr neighborhood of Aleppo, Syria, Oct. 20, 2012.

A Syrian family who fled from the violence in their village, sit in a tent at a displaced camp, in the Syrian village of Atma, near the Turkish border, Nov. 5, 2012.

A Syrian man cries outside the Dar El Shifa hospital in Aleppo, Syria, after his daughter was injured during a Syrian Air Force strike over a school where hundreds of refugees had taken shelter, Oct. 4, 2012.

Motorists drive past damaged buildings in Aleppo, Syria, Dec. 4, 2012.

A man cries while holding the body of his son, killed by the Syrian Army, near Dar El Shifa hospital in Aleppo, Syria, Oct. 3, 2012.

A Free Syrian Army soldier looks through a mirror that helps him see Syrian troops from the other side, during fighting in Aleppo, Syria, Sept. 24, 2012.

People help a wounded Free Syrian Army fighter during heavy clashes with government forces at a military academy besieged by rebels north of Aleppo, Syria, Dec. 15, 2012.

A Syrian rebel stands next to a flaming tire while firing at a Syrian army checkpoint in a suburb of Damascus, Syria, March 17, 2012.

Aida cries as she recovers from severe injuries after the Syrian Army shelled her house in Idlib, north Syria, March 10, 2012. Aida's husband and two of her children were killed.

A Free Syrian Army fighter takes position as the Syrian Army advances toward the town of Sarmin, Syria, Feb. 27, 2012.

A Syrian municipality worker extinguishes a burned court room that was set on fire by Syrian anti-government protesters, in the southern city of Daraa, Syria, March 21, 2011.

Free Syrian Army fighters swim in a pool on the outskirts of Aleppo, Syria, June 12, 2012.

A Syrian man reacts beside his brother, who was seriously wounded during violence between security forces and armed groups in Latakia, Syria, March 27, 2011.

Displaced Syrian children play in a refugee camp near Atma, Idlib province, Syria, Oct. 26, 2012.