article_snippet.sent: This crisis escalated substantially last summer when ISIS swept like lightning through Iraq's Nineveh province, capturing the country's second-largest city, Mosul; a city that was until 2014 a home of a thriving Christian community, there centuries before Islam.
article_snippet.sent: This is not an exaggerated or contrived crisis.
highlights_snippet.sent: Crisis escalated substantially as ISIS has swept through Iraq's Nineveh province, the authors write.