It's worth noting that stealth aircraft
can be tracked by using different radar wavelengths, specifically the longer wavelengths typically used by weather radar. The lower frequency radars are then used to direct higher freq radars onto the target.
Plus there's been research into tracking stealthy aircraft via the disruption in airflow and also by thermal imaging to detect changes in the air temperature caused by high speed aircraft.
Hitting the stealthy aircraft is still problematic but that's slowly changing.
http://news.usni.org/2014/07/29/chin...ee-u-s-stealth
http://airinsight.com/2014/02/24/wil...nd-of-stealth/