All of that stuff can go but it's not going to come anywhere near solving the problems. You have to look at the whole budget to see what it'll take to fix it. The military is the largest single item in the budget but the "non-discretionary" spending stuff like social security, medicare, medicaid, and the 30 or so programs that should rightly be called welfare but are named something else so they don't have to be classified as "welfare" are where the big money is spent. These social programs which are really enormous vote buying schemes are where the real money is spent and they're the only place where the huge amounts of money necessary to balance the budget can be cut. These huge social programs are also what keeps most incumbent politicians in office so there's virtually no chance that they're going to chop them.
You can cut the $17 million in aid to Ireland if it makes you feel better but it's just a drop in the bucket, it's not going to fix anything. Just Obama's trip to India alone cost an estimated 1 Billion dollars, 5800 times the amount spent on the Irish aid. I'd rather just keep Obama's sorry ass at home and keep the Guinness flowing.
