Question: Because of what Islamic terrorist group attacks killed 2,996 people, injured over 6,000 others, and caused at least $10 billion in infrastructure and property damage has the United States government has carried out drone strikes ?
Sentence (from "2014 California wildfires"): In late June to early August, another group of wildfires ignited across the state, some of which reached over twenty thousand acres in size.
Relevant evidence: No