January 29, 2008
"State of the union/2008"
April 19, 2007
"I say polar. You say poller. whatever the caps are melting."
January 25, 2007
"An amazing new trick"
July 15, 2005
"Unattended package"
July 24, 2001
"Global warming accord"
June 8, 2001
"Remedial reading"
"Press conference"