The Juno Spacecraft was launched toward Jupiter on 5 August 2011, and made its first planned trajectory adjustment Wednesday. Over the course of the next five years, a dozen additional corrections are expected before arriving at Jupiter for a year long exploration.
The thrusters fired for 25 minutes and changed the speed by 1.2 meters per second. In August of 2012, Juno will make the first of two adjustments prior to a flyby of Earth for a gravity assist.
For additional information, consult the Juno website.