no, they are not: [1] https://www.cnn.com/2018/09/20/us/maryland-shooting/index.html https://www.cnn.com/2018/09/20/us/maryland-shooting/index.ht... [2] https

no, they are not: [1] https://www.cnn.com/2018/09/20/us/maryland-shooting/index.html https://www.cnn.com/2018/09/20/us/maryland-shooting/index.ht... [2] https://www.cnn.com/2018/04/04/us/who-is-nasim-aghdam-youtube-shooter/index.html https://www.cnn.com/2018/04/04/us/who-is-nasim-aghdam-youtub... [3] https://www.cnn.com/2015/12/03/us/syed-farook-tashfeen-malik-mass-shooting-profile/index.html https://www.cnn.com/2015/12/03/us/syed-farook-tashfeen-malik... [4] https://en.wikipedia.org/wiki/Goleta_postal_facility_shootings https://en.wikipedia.org/wiki/Goleta_postal_facility_shootin...