Investigators are piecing together information about Nasire Best, the suspect who was shot and killed by the Secret Service after allegedly opening fire at a security checkpoint.
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Typically, when a breaking news event occurs that warrants an interruption of current non-news programming, or a regular scheduled newscast, a network will notify its affiliates to stand by and to expect an override. This can often be a short countdown sequence, where the national feed will pause to allow its affiliates to switch over. An opening graphic, usually with a distinctive music cue, will appear, and lower thirds and other graphics may be altered to convey a sense of urgency. This type of break is commonly used in severe weather events, such as tornado warnings and landfalling hurricanes.
