UN: Assad attack on rebels could be worst humanitarian catastrophe of the century

‘Adamant’ Trump to chair Security Council meeting on Iran

Chemical weapons scientist assassinated in Syria

WATCH: UN watchdog confirms use of chlorine gas in Syria

WATCH: US military expert slams ‘very weak’ allied attack on Syria

After barring chemical inspectors, Syria finally grants access to attack site

US bombing of Syria – mission accomplished?

US to hit Russia with new sanctions for aiding Syria’s Assad

Trump to strategize with allies before Syria strike decision

Trump warns Russia missiles ‘will be coming’

Russia vetoes UN Security Council resolution on Syrian chemical massacre

Syria: Fighting over the corpse

Despite chemical weapons attacks, Syria to chair UN conference on disarmament

Mattis faults Russia on Syria, won’t rule out US strike

200 Syrians killed in suspected chemical attack; US furious at ‘horrifying’ reports

NATO joins in expelling Russian diplomats after UK spy poisoning

UK demands stronger statement from Israel on Russia spy poisoning

WATCH: US repeats warning to Syria against chemical attacks

WATCH: US and allies release joint statement blaming Russia for chemical attack

UK issues ultimatum to Russia over poisoning of former spy

WATCH: Israel Fears Syrian Poison Gas May Leak Into Country

German material discovered in Iranian-made Syrian chemical weapons

US ‘gravely alarmed’ by Syrian chemical attack

WATCH: Israel prepares for Hezbollah chemical attack

UN confirms: Syrian government launched April’s gas attack

North Korean shipments of chemical weapons to Syria intercepted

WATCH: How Trump should respond if Assad uses chemical weapons

WATCH: Iran accuses US of fake news on Syrian chemical weapons

White House warns: Syria’s Assad planning chemical attack

At Holocaust memorial, Trump praises Jewish resilience and State of Israel

US accuses Syria of mass executions, burning bodies in crematorium

US and Israel agree on twin threats of militant Islam: Iran and ISIS

Israeli warning: Syria still has deadly chemical weapons

WATCH: Russia vetoes UN condemning of Syrian chemical attack

Spicer apologizes following uproar over Hitler remarks

Russia: Syrian army struck rebel chemical weapons arsenal

White House: Obama’s weakness led to gas attack in Syria

Syrian chemical-weapons attack kills scores, including children

EU imposes sanctions on Syrians for chemical weapons attacks

Syria used chemical weapons against rebels, rights group accuses