ISIS fighters' jailbreak prompts warnings

The threat of ISIS fighters breaking out of the massive prison camps where they're being held in Syria and Iraq is growing, according to a new report and a senior U.S. official. While President Donald Trump has also warned of the urgency, he took the issue a step further in recent days and threatened to free ISIS fighters at Europe's borders if countries don't repatriate them. U.S. ambassador-at-large for counterterrorism Nathan Sales rang those alarm bells Tuesday, but wouldn't say whether the U.S. was actively planning to carry out Trump's threat. "It's impossible to predict what tomorrow is going to look like in Syria, let alone two months or six months from now ... You could envision all sorts of other scenarios playing out," Sales told ABC News in response to questions about Trump's comments. "We don't want to assume that the relative stability that we see today is an enduring feature." The Institute for the Study of War reported Tuesday that ISIS "is preparing to free its...