Not long ago, SpaceX founder Elon Musk cracked what he once labeled a monopoly for Defense Department space launches, successfully breaking into a business that was dominated by United Launch Alliance LLC. The DOD’s appetite for space access is voracious, given the myriad reconnaissance, defense, and communications roles there, coupled with a future where conflicts are almost certain to involve space assets. Musk’s 2014 lawsuit against the government was settled out of court, and the Pentagon certified SpaceX, also known as Space Exploration Technologies Corp., as a suitable supplier of military space launches. SpaceX’s first gig for the military was in May when it launched a satellite for the National Reconnaissance Office. But in a quite public sense, Musk and the government this summer will test the theory that cheaper space launches are suitable for sensitive military missions. In August, SpaceX will carry one of the Pentagon’s premiere yet highly classified platforms into orbit. The X-37B spy craft, an unmanned miniature version of the Space Shuttle, logs missions that are well over a year in length. The most recent X-37B sojourn ended in May after more than 700 days circling the Earth. Boeing has built two of the craft, with the first launched in 2010. The August blastoff will be the program’s fifth flight. One major reason for SpaceX’s appeal to Pentagon brass: sticker price. With its launches starting around $61 million, Musk’s company has been able to undercut its more established rival. United Launch Alliance, a Centennial, Colo.-based joint venture of Boeing Co. and Lockheed Martin Corp., boasts an unblemished record of more than 100 launches, but it’s still working to bring its cost below $100 million. It plans to do so by 2019.