Despite the drop, attacks by ISIS and an al-Qaeda affiliate have risen in first six months of the year.
The suspect fled to Syria after the murders, but Turkish police caught him when he tried to return.
The former diplomat says the U.S. must rail against Iranian domination in the Middle East.
German authorities say they are providing assistance to the 16-year-old.
As forces supported by the U.S. and Russia defeat ISIS across Syria, Secretary of State Rex Tillerson seeks Moscow's help to prevent a new conflict.
An ISIS suspect recounts murders and rape in court testimony.
Iraqi forces are preparing an offensive on ISIS-held Tal Afar, where the group has some 2,000 fighters.
Human Rights Watch said an Iraqi unit trained by American forces summarily executed prisoners in western Mosul.
The Kurdish-Arab alliance is battling to oust ISIS from the city where it executed several Western hostages.
Fox News only issued an "update" to the segment that angered the newspaper, which demanded an on-air apology.
Pro-Kurd media shared footage of Syrians burning burqas and cutting their beards after the Syrian Democratic Forces defeated ISIS in an area of Raqqa.
The Temple Mount attack has spurred a spate of vicious attacks on both sides
The newspaper is seeking an apology as Trump's claim the paper leaked information becomes his latest attack on the press.
German security services say more than 900 German nationals have left the country to fight for ISIS.
It is actually the United States, not Iran, that appears to be in breach of the Iran nuke deal.