As Americans prepare to celebrate Independence Day, many of us look forward to gathering with family and friends.There will be backyard barbecues, fireworks and for many adults, a toast or two to the holiday.But this Fourth of July carries even deeper meaning.America is celebrating its 250th anniversary, a remarkable milestone that invites us to reflect on our nation's journey.For two and a half centuries, the United States has faced challenges, endured hardships and continued striving toward...