diff --git a/EduNetworkBuilder/Network.cs b/EduNetworkBuilder/Network.cs
index 457c509..dfd8dc1 100644
--- a/EduNetworkBuilder/Network.cs
+++ b/EduNetworkBuilder/Network.cs
@@ -1659,6 +1659,26 @@ namespace EduNetworkBuilder
             return null;
         }
 
+        public bool DeviceInTree(LinkType myLink, Point location)
+        {
+            NetworkDevice ND = null;
+            if (myLink != LinkType.wireless) return false; //we do not care
+            foreach (NetworkComponent NC in NetComponents)
+            {
+                if (NB.GetComponentType(NC) == GeneralComponentType.device)
+                {
+                    ND = (NetworkDevice)NC;
+                    if (ND.GetNetType() == NetworkComponentType.tree)
+                    {
+                        if (ND.GetMyRectangle().Contains(location))
+                            return true;
+                    }
+                }
+            }
+            return false;
+
+        }
+
         public bool DeviceIsOverDamaging(LinkType myLink, Point location)
         {
             NetworkDevice ND;
diff --git a/EduNetworkBuilder/NetworkLink.cs b/EduNetworkBuilder/NetworkLink.cs
index c3408e4..131fda8 100644
--- a/EduNetworkBuilder/NetworkLink.cs
+++ b/EduNetworkBuilder/NetworkLink.cs
@@ -384,6 +384,10 @@ namespace EduNetworkBuilder
             }
             if(theLinkType == LinkType.wireless)
             {
+                if(myNet.DeviceInTree(theLinkType, newLocation))
+                {
+                    tPacket.health -= 60;
+                }
                 NetworkDevice sDev = myNet.GetDeviceFromID(SrcNic);
                 NetworkDevice dDev = myNet.GetDeviceFromID(DstNic);
                 double distance = myNet.distance(sDev, dDev) * (tPacket.myLinkPercent * 0.01);