Index: ai/advdomestic.c
===================================================================
RCS file: /home/freeciv/CVS/freeciv/ai/advdomestic.c,v
retrieving revision 1.99
diff -u -r1.99 advdomestic.c
--- ai/advdomestic.c	13 Jan 2003 23:27:03 -0000	1.99
+++ ai/advdomestic.c	24 Jan 2003 16:02:58 -0000
@@ -619,7 +619,10 @@
       values[B_SDI] = MAX(ai_eval_threat_nuclear(pplayer, pcity),
 			ai_eval_threat_missile(pplayer, pcity));
       break;
-  
+    case B_AIRPORT:
+      values[id] = TRADE_WEIGHTING * 2;
+      break;
+
     /* spaceship production */
     case B_SCOMP:
       if ((game.spacerace)
Index: data/default/buildings.ruleset
===================================================================
RCS file: /home/freeciv/CVS/freeciv/data/default/buildings.ruleset,v
retrieving revision 1.36
diff -u -r1.36 buildings.ruleset
--- data/default/buildings.ruleset	5 Jan 2003 23:16:53 -0000	1.36
+++ data/default/buildings.ruleset	24 Jan 2003 16:02:58 -0000
@@ -73,7 +73,7 @@
 
 [building_airport]
 name		= _("Airport")
-tech_req	= "Radio"
+tech_req	= "None"
 bldg_req	= "None"
 graphic	= "b.airport"
 graphic_alt	= "-"
@@ -84,8 +84,8 @@
 ;equiv_repl	=
 obsolete_by	= "None"
 is_wonder	= 0
-build_cost	= 160
-upkeep		= 3
+build_cost	= 40
+upkeep		= 0
 sabotage	= 100
 effect		=
     { "type", "range", "aff_unit"