Paris, mali and across the middle east. They suggest avoiding crowded spaces. This family tries to take that advice to heart. Well be a little more anxious in bigger crowd, but i think thats natural as well. Reporter the alert comes as americans flock to airports to visit family over the thanksgiving holiday. This man said he would have postponed a trip had he known about the alert sooner. We would have thought and kind of decided maybe later on when things are cooler and better. Reporter some experienced International Travelers found the warning unhelpful. Theres not much we can do. The risk is everywhere, and its a matter of the army, police, and states to protect the people, but besides that theres nothing we can do. Reporter the department of Homeland Security says it knows of no specific threats against us target, but Security Officials would no doubt prefer americans travel aware. Being aware of it and being safe and travel with our eyes open, and keep aware of whats going on aro