Police investigate the deadly shooting at a California mosque as we learn more about the gunmen and the security guard killed protecting others; New video reveals the final moments before a UPS cargo plane crash and what may have gone wrong in the air; Cities crack down on viral 'teen takeovers' with a new push to hold parents responsible; A new proposal could help travelers skip long TSA lines at airports; Authorities respond after two dangerous stunts at two famous landmarks spark outrage online.
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