The blaze engulfed Damascus International Airport and the Mezzeh army base.
The Syrian president had declared in 2013 that it had nearly 1,300 tonnes of chemical weapons.
Mattis will arrive in Saudi capital Riyadh on 18 April, before visiting Israel, Qatar, Egypt and Djibouti.
Protests began over the treatment of Palestinians in Israeli prisons.
Palestinian political prisoners led by Fatah leader Marwan Barghouti are demanding basic rights in jails.
According to local reports the victim is a 25-year-old British student.
Bashar al-Jaafari also accused the West of plotting a way back into the conflict before the chemical attack.
Yad Vashem said his remarks were "liable to strengthen the hands of those whose goal is to distort history".
Israeli police say the 18-year-old, who terrorised US Jewish communities, worked with criminals.
Livingstone claimed Hitler supported Zionism but Baddiel quotes Mein Kampf to prove him wrong.
Israel Defense Forces (IDF) arrests a Palestinian man after the attack.
Prime Minister Benjamin Netanyahu calls David's Sling system an 'existential danger' to Israel's enemies.
The Palestine Islamist group threatens to avenge the killing of Hamas military commander Mazen Fuqaha.
Police spokesman Luba Samri said the three victims suffered light wounds
Netanyahu gives green light despite promising Trump he would 'hold back' on fresh settlements.
Former London mayor's claim Hitler 'conspired with Zionists' contradicted by anti-Jewish telegram.
Police found the victim in her 30s burnt and headless in an apartment.
Women are not portrayed on film posters in the Orthodox Jewish settlement of Bnei Brak.
Pence told the influential US lobbying group AIPAC the administration was still considering the move.
The individual, aged 19, was arrested at the request of the FBI investigating multiple bomb hoax calls.
Police in Israel have arrested a 19-year in connection with a series of bomb threats around the world.
Mustafa Badreddine was killed in Syria last year amid an 'internal crisis' within the group.