WASHINGTON — Almost seven out of every 10 U.S. troops are either overweight or obese, according to a new report, which also warns the growing trend could compromise military readiness and undermine national security.The American Security Project, a Washington-based nonprofit organization that studies modern national security issues, conducted the study and found 68% of active-duty service members fall somewhere between overweight and obese on the body mass index, which is a long-used but controversial method of assessing a person’s body classification by height and weight. A person between 25 and 30 on the BMI is considered clinically overweight and more...