BAGHDAD, Iraq — Excerpts from an essay written recently by Farris Hassan, 16, of Fort Lauderdale, Fla., who traveled to Iraq without telling his parents: There is a struggle in Iraq between good and evil, between those striving for freedom and liberty and those striving for death and destruction. You are aware of the heinous acts of the terrorists: Women and children massacred, innocent aid workers decapitated, indiscriminate murder. You are also aware of the heroic aspirations of the Iraqi people: liberty, democracy, security, normality. Those terrorists are not human but pure evil. For their goals to be thwarted, decent...