User talk:121.52.154.138

May 2010
Welcome to Wikipedia. The recent edit you made to Air traffic control has been reverted, as it appears to have removed content from the page without explanation. Use the sandbox for testing; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. Netalarm  poke  04:40, 19 May 2010 (UTC)

Please stop your disruptive editing. If you continue to vandalize Wikipedia, as you did at Air traffic control, you may be blocked from editing. Materialscientist (talk) 09:31, 19 May 2010 (UTC)