Maybe it's my imagination but could the "kids" showing up at the US-Mexico border be part of a major distraction to have ISIS walk into the US?
Don't you find the timing a bit interesting?  
Over in Iraq/Syria, a huge and extremely well funded army of terrorists announces its intentions to destroy the US, i.e. "see you in New York"!
Over in Central America, thousands of kids go north and find their way to the US border.
Who paid for these trips?  You can not hitchhike your way from Guatemala to Texas.  Someone had to pay the bus fare, the train pass or the "bribes" that had Mexican authorities looking the other way.
Again, maybe it's my imagination. At the same time, I was not surprised to read the Breibart story that ISIS may have crossed the US Mexico border:
"Joshua Katz, an Army veteran and former CIA operations officer who served as Senior Policy Advisor to the Chairman of the House Homeland Security Committee said it is “very, very, true” that ISIS may have crossed the southern border.    
Katz reported that Gov. Rick Perry’s (R-TX) recent comments that it was a “very real possibility” that ISIS had already crossed the southern border were “very, very true” on Friday’s “Fox and Friends” on the Fox News Channel.  
“ISIS is a group that will do whatever it takes in order to accomplish its goals. It's very brutal. It's very aggressive. They're going to do anything, and if that means working with cartels, if that means working with other enlisted groups in order to attack the homeland, they will do that. Other groups like Al Qaeda, or other terrorist groups who have a desire to hit the homeland will also use that ... we have this sort of this double front aggression toward American borders” he added."
Yes, ISIS is on a mission to attack our homeland.  They have the desire and the money. We have a porous border.   I hope that I'm wrong but we are very vulnerable again to a 9-11 type attack.  We let our guard down and ISIS didn't get the memo that the war was over.