diff --git a/Moose Development/Moose/Ops/AirWing.lua b/Moose Development/Moose/Ops/AirWing.lua
index 5f7c3e623..6d29cb004 100644
--- a/Moose Development/Moose/Ops/AirWing.lua	
+++ b/Moose Development/Moose/Ops/AirWing.lua	
@@ -113,6 +113,7 @@ function AIRWING:New(warehousename, airwingname)
   self:AddTransition("*",             "MissionNew",       "*")           -- Add a new mission.  
   self:AddTransition("*",             "MissionRequest",   "*")           -- Add a (mission) request to the warehouse.
   self:AddTransition("*",             "MissionDone",      "*")           -- Mission is over.
+  self:AddTransition("*",             "MissionCancel",    "*")           -- Mission is over.
 
   ------------------------
   --- Pseudo Functions ---
@@ -507,7 +508,7 @@ end
 --- Optimize chosen assets for the mission at hand.
 -- @param #AIRWING self
 -- @param #table assets Table of (unoptimized) assets.
--- @param Ops.Auftrag#AUFTRAG Next mission or *nil*.
+-- @param Ops.Auftrag#AUFTRAG Mission Next mission or *nil*.
 function AIRWING:_OptimizeAssetSelection(assets, Mission)
 
   local TargetCoordinate=Mission:GetTargetCoordinate()
@@ -585,15 +586,27 @@ function AIRWING:onafterNewAsset(From, Event, To, asset, assignment)
   end
 end
 
---- On after "MissionNew" event.
+--- On after "MissionCancel" event.
 -- @param #AIRWING self
 -- @param #string From From state.
 -- @param #string Event Event.
 -- @param #string To To state.
--- @param Ops.Auftrag#AUFTRAG Mission
-function AIRWING:onafterMissionNew(From, Event, To, Mission)
+-- @param Ops.Auftrag#AUFTRAG Mission The mission to be cancelled.
+function AIRWING:onafterMissionCancel(From, Event, To, Mission)
+  
+  self:I(self.lid..string.format("Cancel mission %s", Mission.name))
+  
+  for _,_asset in pairs(Mission.assets) do
+    local asset=_asset --#AIRWING.SquadronAsset
+    
+    local flightgroup=asset.flightgroup
+    
+    if flightgroup then
+      flightgroup:MissionCancel(Mission)
+    end
+  end
+  
   
-  self:I(self.lid..string.format("New mission %s", Mission.name))
 
 end
 
diff --git a/Moose Development/Moose/Ops/Auftrag.lua b/Moose Development/Moose/Ops/Auftrag.lua
index b40dafa16..ff41a82ac 100644
--- a/Moose Development/Moose/Ops/Auftrag.lua	
+++ b/Moose Development/Moose/Ops/Auftrag.lua	
@@ -22,6 +22,7 @@
 -- @field #string status Mission status.
 -- @field #string name Mission name.
 -- @field #number prio Mission priority.
+-- @field #boolean urgent Mission is urgent. Running missions with lower prio might be cancelled.
 -- @field #number Tstart Mission start time in seconds.
 -- @field #number Tstop Mission stop time in seconds.
 -- @field #number duration Mission duration in seconds.
@@ -408,7 +409,7 @@ end
 -- @return #AUFTRAG self
 function AUFTRAG:SetPriority(Prio, Urgent)
   self.prio=Prio or 50
-  self.isurgent=Urgent
+  self.urgent=Urgent
   return self
 end
 
diff --git a/Moose Development/Moose/Ops/FlightGroup.lua b/Moose Development/Moose/Ops/FlightGroup.lua
index cc4682808..b727ed471 100644
--- a/Moose Development/Moose/Ops/FlightGroup.lua	
+++ b/Moose Development/Moose/Ops/FlightGroup.lua	
@@ -1398,12 +1398,26 @@ function FLIGHTGROUP:onafterQueueUpdate(From, Event, To)
   ---
 
    -- First check if group is alive? Late activated groups are activated and uncontrolled units are started automatically.
-  if self:IsAlive()~=nil and not self.currentmission then
+  if self:IsAlive()~=nil then
   
     local mission=self:_GetNextMission()
     
     if mission then
-      self:MissionStart(mission)      
+    
+      local currentmission=self:GetMissionCurrent()
+      
+      if currentmission then
+      
+        -- Current mission but new mission is urgent with higher prio.
+        if mission.urgent and mission.prio<currentmission.prio then
+          self:MissionCancel(currentmission)
+          self:MissionStart(mission)
+        end
+        
+      else
+        -- No current mission.
+        self:MissionStart(mission)        
+      end
     end
   end
 
@@ -2260,24 +2274,21 @@ function FLIGHTGROUP:onafterUpdateRoute(From, Event, To, n)
     ---
   
     self:E(self.lid.."WARNING: No waypoints left. Dunno what to do!")
+    
+    --[[
   
-    -- Get destination or home airbase.
-    local airbase=self.destbase or self.homebase
-    
-    if self:IsAirborne() then
-    
-      -- TODO: check if no more scheduled tasks.
-      
-      if airbase then
-          -- Route flight to destination/home.
-          --self:RTB(airbase)        
-      else
-        -- Let flight orbit.
-        --self:Orbit(self.group:GetCoordinate(), UTILS.FeetToMeters(20000), self.group:GetSpeedMax()*0.4)
-      end
-      
+    -- Send flight to destination. NOTE that if there are still remaining tasks, the RTB call is delayed by 10 sec until all tasks are done.
+    if self.destbase then
+      self:__RTB(-1, self.destbase)
+    elseif self.destzone then
+      self:__RTZ(-1, self.destzone)
+    else
+      self:__Wait(-1)
+      self:E(self.lid.."ERROR: Reached final waypoint but no destination set! Don't know what to do?!")
     end
     
+    ]]
+    
   end
 
 end
@@ -2365,6 +2376,8 @@ function FLIGHTGROUP:onafterPassingWaypoint(From, Event, To, n, N)
     --TODO: Find better way to RTB!
     self:I(self.lid.."FF group passed final waypoint!")
   
+    --[[
+  
     -- Send flight to destination. NOTE that if there are still remaining tasks, the RTB call is delayed by 10 sec until all tasks are done.
     if self.destbase then
       self:__RTB(-1, self.destbase)
@@ -2374,6 +2387,8 @@ function FLIGHTGROUP:onafterPassingWaypoint(From, Event, To, n, N)
       self:__Wait(-1)
       self:E(self.lid.."ERROR: Reached final waypoint but no destination set! Don't know what to do?!")
     end
+    
+    ]]
 
   end