For The New York TimesSHAREMy brother was  in a mass shooting atop the Empire State Building almost 25 years ago. Every time another such shooting makes headlines it breaks my heart to know that other families are experiencing the same shock, horror and grief that ours has.It also breaks my heart to see gun control supporters, part of a movement I once helped to lead, repeat the mistakes that doom us all to the unacceptable status quo: tens of thousands of shooting deaths a year.RelatedThe pattern is as familiar as it is tragic: In the immediate aftermath of a mass shooting, the...…For The New York TimesSHAREMy brother was  in a mass shooting atop the Empire State Building almost 25 years ago. Every time another such shooting makes headlines it breaks my heart to know that other families are experiencing the same shock, horror and grief that ours has.It also breaks my heart to see gun control supporters, part of a movement I once helped to lead, repeat the mistakes that doom us all to the unacceptable status quo: tens of thousands of shooting deaths a year.RelatedThe pattern is as familiar as it is tragic: In the immediate aftermath of a mass shooting, the...WW…