As Congress responds to President Donald Trump’s attack on Iran, lawmakers who served on the front lines of Iraq and Afghanistan are making their voices heard. They're leaning on firsthand experience of serving in the wars after the Sept. 11, 2001, attacks as they assess the Iran conflict. Lawmakers have been wearing bracelets etched with the names of friends killed in battle. And they're telling stories of coming under attack from Iran-backed militant groups. Veterans in both major political parties share deep reservations about the war, fearful another generation of soldiers could soon face the same combat experiences they did.