The UK's HadCRUT global temperature dataset indicates a global cooling trend of -0.2°C/century over last 15 years, plus May 2012 was slightly cooler - the global warming science facts, per the IPCC's own gold-standard
(click on image to enlarge)
While much of the U.S. has been doing a slow roast over the last few months, other parts of the world are cooling. So much so that in the aggregate the global mean temperature slightly fell during May 2012.
As the adjacent chart indicates, over the last 180 months (15 years) global temperatures have been on a cooling trend. This trend persists despite the increasing levels of atmospheric CO2 and at least two powerful El Niño's since 1997.
There is not a single global climate model that predicted this stable/cooling trend. All models predicted "accelerating" global warming because of their singular dependance on levels of atmospheric CO2.
As can be observed and surmised, clearly there are other forces are driving the IPCC-HadCRUT global temperatures other than CO2. The global warming science facts do not support the speculations of climate doomsday alarmists.
Additional global temperature charts.