Anyone who heads overseas for any length of time knows it: Sometimes, the hardest part of a deployment is simply being away. Sgt. Jimmy Shea, a combat correspondent, is grappling with that as he heads to Afghanistan soon for a six-month deployment with the Armed Forces Network. He’ll be based at Bagram Air Base, producing news content about the work U.S. forces do overseas. Like so many others, Shea is leaving behind a family to deploy. He has a wife and siblings, and clearly loves them dearly, based on the series of videos he has posted on YouTube recently. Here’s the…