Military strike marked swift reversal for Trump who said US should stay out of years-long civil war
Says US will no longer wait for Syrian President to use chemical weapons without any consequences
Rebels of the Free Syrian Army described attack as a turning point in 'eliminating the impunity'
Syria termed the missile barrage American aggression and held consultations with Russia and Iran
The fatality toll rose to at least 75 people, including 20 children
Most IS combatants withdrew from Palmyra, according to a war monitoring group
Some had been shot and others beheaded
The HNC insists Syrian President Bashar al-Assad must leave office as part of any deal
More than 310,000 people have been killed since Syria's conflict erupted in March 2011
Pro-government forces shelled the city's al-Waer neighborhood with tank and artillery fire
Most of the victims were civilians believed to be opposed to the government of President Assad
This marks second major US counterterrorism strike in the final hours of Barack Obama's presidency
United States should be definitely invited, and that is what we agreed with Russia: Turkey
By the end of 2017, Syria will probably become a country of four parts
Assad said it was not yet clear who would represent the opposition and no date had been set yet
Rescuers and doctors said the explosion was so large there were nearly 100 wounded and burned
Russia said the deal was signed by seven of Syria's major rebel factions
However, the Syrian government denies using chemical weapons in the civil war, now in its sixth year
Syria has been locked in war for more than five years, leaving more than 310,000 people dead
Russia has vetoed six resolutions on Syria since the conflict began in March 2011