In Syria, war monitors say at least 42 people have been killed in recent days as the Syrian government continues its bombing campaign and ground offensive against Eastern Ghouta, outside the capital Damascus. On Monday, U.S. Ambassador to the United Nations Nikki Haley warned the United States is “prepared to act” if chemical weapons are used in Eastern Ghouta.

Nikki Haley: “We also warn any nation that is determined to impose its will through chemical attacks and inhuman suffering, most especially the outlaw Syrian regime, the United States remains prepared to act, if we must. It is not the path we prefer, but it is a path we have demonstrated we will take. And we are prepared to take it again.”

Activists have accused Syria’s government of using chlorine gas and incendiary white phosphorus munitions. Syria’s government denies using chemical weapons.