NASA Holds Briefing On Juno Mission Arrival At Jupiter

PASADENA, CA - JUNE 30: A tour group views a 1/4 scale model of the Juno spacecraft as NASA officials and the public look forward to the Independence Day arrival of the the Juno spacecraft to Jupiter, at JPL on June 30, 2016 in Pasadena, California. After having traveling nearly 1.8 billion miles over the past five years, the NASA Juno spacecraft will arrival to Jupiter on the Fourth of July to go enter orbit and gather data to study the enigmas beneath the cloud tops of Jupiter. The risky $1.1 billion mission will fail if it does not enter orbit on the first try and overshoots the planet. (Photo by David McNew/Getty Images)