The goal of the covert program is to sabotage missiles so they explode seconds after launch, and North Korean military rockets have been regularly exploding, veering off course, and plunging into the sea since soon after Obama ordered the disruption efforts. Medium-range Musudan missiles, for example, have a failure rate of 88 percent, The New York Times says. There are several ways the U.S. might sabotage Pyongyang’s missile program, experts say. “You could either go after the supply chain, embedding flaws in parts and systems that they are using,” Peter Singer, a fellow at New America, told CNN. Other possible tactics include hacking the electronics to mess with the launch sequence or trigger the self-destruct mechanism.