There is nothing inevitable about the U.S. winning wars, and on that point the Pentagon’s new missile defense review is alarming. Russia and China are ramping up investments in sophisticated technologies while America is spending less on defending itself. One urgent priority: A constellation of space sensors that could shore up U.S. missile defenses.
More than 20 nations have offensive missile technology, the Defense Department notes in its review released last month. China can already threaten the U.S. with some 125 nuclear…