If more people in government were as careful and compassionate in the handling of classified data as a convicted computer hacker, our country would be more secure and our politics less bitter.

Adrián Lamo, who in 2010 felt compelled to report Pfc. Bradley Manning’s mass leaking of U.S. military secrets, died last week at the age of 37. His father Mario Lamo shared the news on Facebook:

With great sadness and a broken heart I have...