As we head into the 4th of July weekend, when Americans celebrate not only the country's independence but its ideals and principles, President Trump's travel ban is complicating entry into the United States for visitors from six predominantly Muslim countries and suspends entry for refugees altogether. It's been less than 24 hours since the ban was reinstated, but its interpretation of what constitutes a valid relationship to enter the United States is already at the center of heated debate. The roll-out at airports has been less rocky, but the new rules are generating a new round of court fights. How will the travel ban work? What's the legal future of the measure? Can this temporary, modified ban prevent terror attacks, or does it hurt America's influence and standing in the world?