Washington (CNN) -- President Obama told CNN's Larry King on Thursday that he is furious about the Gulf of Mexico oil spill, but his job is to fix things instead of just yelling at people. In a White House interview for the 25th anniversary of "Larry King Live" on CNN, Obama called the oil spill an unprecedented crisis for the country but added it could have been worse. Despite the challenges posed by the oil spill, global threats involving North Korea and Iran and political battles with Congress, Obama called being president "the best job on Earth."