Defected Syrian policeman Adnan al-Hamod lights a kerosene lamp inside an underground shelter he made to protect his family from Syrian government shelling and airstrikes, Jirjanaz village, Idlib province, Syria, Feb. 28, 2013.

Nihal, 9, puts olive tree branches inside a wooden stove at an underground Roman tomb which her family uses for shelter, Jabal al-Zaweya, Idlib province, Syria, Feb. 28, 2013.

Nadia, 53, steps out of an underground Roman tomb used as shelter from shelling and airstrikes, Jabal al-Zaweya, Idlib province, Syria, Feb. 28, 2013.

Sami, 32, steps into an underground Roman tomb used for shelter from Syrian government shelling and airstrikes, Jabal al-Zaweya, Idlib province, Syria, Feb. 28, 2013.

A Free Syrian Army fighter, Abu Mohammed, speaks inside a cave used for shelter from Syrian government shelling and airstrikes, Jabal al-Zaweya, Idlib province, Syria, Feb. 28, 2013.

Syrian children walk out of an underground tunnel that their father made with a jackhammer for shelter from Syrian government forces shelling and airstrikes, Jirjanaz village, Idlib province, Syria, Feb. 28, 2013.

Sobhi al-Hamod, 60, stands inside an underground shelter he made using a jackhammer to protect his family from Syrian government forces shelling and airstrikes, Jirjanaz, Idlib province, Syria, Feb. 28, 2013.

Nihal, 9, looks at the entrance of an underground Roman tomb used as shelter from Syrian government shelling and airstrikes, Jabal al-Zaweya, Idlib province, Syria, Feb. 28, 2013.