The Stryker infantry carrier vehicle's new mounted antitank missile system is not operationally effective and demonstrated a 7% chance of completing a 24-hour mission without an essential function failure in an operational test last year, according to a report from the Pentagon's top weapons tester. Unclassified reliability and performance results from the testing were initially shielded from public scrutiny in the director of operational test and evaluation’s annual report, the public version of which was released in January. That report...