A wealthy Washington, D.C., suburb's public school district is advising teachers not to link 9/11 with radical Islam and to be sure to create "safe spaces" for Muslim students at the nation somberly marks the 25th anniversary of the terror attacks that killed nearly 3,000 Americans.The guardrails in a six-page instructional guide, titled "25th Anniversary and Commemoration of 9/11" and distributed to teachers, has prompted critics to accuse Fairfax County (Virginia) Public School's liberal leaders of coddling post-9/11 sensitivities rather than teaching history."It's sort of a vanilla way to d...