As others mentioned, this sounds like a sensory disorder. The first step would be to not allow him to watch the news. I have similar issues as do my kids and watching the news can trigger alot of worry and anxiety. Your son sounds much like my oldest child.
Has your child been screened for celiac disease or food allergies? The thing that has helped us all the most is removing gluten (found in wheat, rye, oats and barley) and casein (found in dairy from our diets). You will find links to these diets on many of the websites discussing sensory integration issues, such as this one: http://www.sensorynation.com/resources.html
The intolerance to gluten (and/or celiac disease) is highly under-diagnosed. It is a genetic disorder, whose primary symptoms were originally consider to be GI in nature, but recent research correlates the intolerance with a myriad of neurological and psychological problems, as the gluten proteins do impact the brain. Here's a summary of the research correlating ADHD with celiac/gluten intolerance:
http://www.celiac.com/st_prod.html?p_prodid=112&p_cat...
Here's info on testing for this disease:
http://www.dfwceliac.org/html/testing.html
The dietary change had a huge impact on my oldest son, whose level of anxiety and worry has decreased dramatically. He is also much more social and much, much happier overall (we had had teachers prior to the diet suggest he was depressed). My younger son's ADHD behaviors have been dramatically reduced and he's now doing exceptionally well in school (without any drugs - only the gluten/casein-free diet).
I wish you well on your journey to improve your son's health. Please contact me if you'd like more info.
M. B