There was a small release of radioactive steam at Three Mile Island in 1979, and there have also been a few releases at Fukushima Daiichi.

WSJ: William Tucker: Japan Does Not Face Another Chernobyl

In 1889 the Peugeots produced a three-wheeled, steam-powered car.

FORBES: Magazine Article

But while Obama is expected to do well in all three and pick up steam this week, the Clinton campaign is eyeing even larger delegate loads coming up next month in Texas and Ohio.

NPR: Clinton, Obama Face Off in Virginia