On March 25, bureau of American missile defense announces, in the test of intercept of missile of Liu Jizhong Cheng that they organize recently, the target rocket that intercepted and capture missile of a similar intercontinental successfully (namely " intercontinental missile " ) . Cent of system of defense of American country missile is sea radical and Liu Ji, the U.S. Army ever organized experiment of intercontinental missile intercept 2017, oppugn actual intercept ability of the United States with respect to somebody at that time. After 2 years today, still have an expert to the U.S. Army this one " results of battle " express to suspect. The U.S. Army says, the target rocket of similar intercontinental missile, from the Pacific Ocean boast outside 6400 kilometers test site launchs the Reagan of Gu Lin atoll. Be located in the system of intercept of Liu Ji terminal of air base of California city Vandenberg, fired 2 15 meters tall GMI missile. GMI missile is in aerospace brim, successful intercept " intercontinental missile " . The U.S. Army says, this the experiment basically checked two grounds intercept implement fusillade function. Among them, intercept of the first GBI-LEAD implement the task is to destroy flight target, and system of intercept of the 2nd GBI-Trail discerns instantly the odd flight body after explosion, choice and attack are next target. Director of bureau of American missile defense says, this is " intercept of first time fusillade, its are complex degree cans be imagined " , the success of the test is " a crucial milepost " . The dagger of thunder of missile expert case of city of equestrian Sa Zhu Sai had doubt to this. He says in TV, "Although bureau of American missile defense says the test succeeded, but we are done not have from inside any information, see a test whether up to mark " . 2017, american organization guides instead when the test, the doubt that get basically is Liu Ji the missile career that missile intercept system launchs does not follow to go up the flight speed of intercontinental missile. Because intercontinental missile speed can amount to 20 times velocity of sound. Geleige was calculated the advancing distance of intercept missile and speed, far get slower than intercontinental missile much. The fusillade this year checks, it is this problem likewise.