One of the U.S. military's most senior officers is concerned that the intense focus on acquiring a new fleet of Mine Resistant Ambush Protected vehicles designed to protect against the blast effects of roadside bombs has created an unrealistic expectation that everyone who rides in one will be protected from a catastrophic hit. Adm. Edmund Giambastiani, vice chairman of the Joint Chiefs of Staff who has ridden in MRAP-like vehicles on recent trips to Iraq, aimed in an interview to...