Lonewolf, I think you are on your own here.
No-one suggested they could attack Washington, well, not this year anyway. That wasn't even the point. But if you want to talk about present capabilities, they have already had some success with missile salvos onto US bases in Iraq, causing some rather nasty brain injuries to US servicemen for a start. Not to mention mass attacks on Israel, shooting down Reaper drones, attacking and commandeering shipping into the Gulf, attacking Saudi oil facilities, using intel ships to direct Houthi fire, etc. Do we really want to stir that Republican Guard hornets' nest further by giving them a good whump?