No. Not joking. 
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WAPO
Jan. 2016 Sheriffs issue a call to arms: 'One in New York state told people who are licensed to carry a gun to “please do so
www.washingtonpost.com/news/post-nation/wp/2016/01/18/u-s-sheriffs-call-to-arms-urge-citizens-to-help-protect/

'This is war': Florida sheriff urges citizens to arm themselves

Texas Police Chief, Others Urge Citizens to Arm Themselves 

 Detroit police chief wants citizens to arm themselves

Milwaukee County Sheriff: 'You Have A Duty To Protect Yourself'

San Bernardino: NY Sheriff Urges Citizens to Carry Guns “To ensure the safety of yourself and others," 

Et Cetera