National Guard soldier Justin Switzer kisses his son Preston, 3, before leaving Tuesday morning. In a mix of cheer and sorrow, friends and family of more than 160 U.S. National Guard service men and women Ñ now active duty soldiers in the U.S. Army Ñsaw their loved ones off Tuesday at the Rock Hill Armory in what has been a long-awaited parting. ANDY BURRISS — aburriss@heraldonline.com Buy Photo