President Barack Obama has rejected TransCanada's application to build the controversial Keystone XL pipeline across the United States. He said Friday that “shipping dirtier crude oil into our country” would not increase America’s energy security.

Feb 24

Obama vetoes Keystone bill

Defying the Republican-run Congress, President Barack Obama rejected a bill Tuesday to approve construction of the Keystone XL oil pipeline, wielding his veto power for only the third time in his presidency.