Lost plane's request to change course was denied

The plane sought permission to climb above threatening clouds. Air traffic control couldn't say yes immediately — there was no room. Six other airliners were crowding the airspace, forcing AirAsia Flight 8501 to remain at a lower altitude.

from Yahoo News - Latest News & Headlines http://news.yahoo.com/indonesian-official-prospects-bleak-missing-jet-065646556.html

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