6.4 earthquake strikes Southern California, felt in L.A. & Vegas; Ahead: Trump to speak at controversial July 4th event

USGS seismologist: chance of another damaging quake today; USGS: At least 58 aftershocks after 6.4 earthquake; Kern County Fire: Ridgecrest Hospital is being evacuated; Officials report broken water mains, rock slides, power lines down; Largest earthquake in 20 years hits Southern California; USGS: At least 73 aftershocks after 6.4 earthquake; Source: Military chiefs concerned about politicization of July 4th; WH aides working overtime to fill event space with crowd; Trump baby blimp makes appearance on National Mall; Troops reportedly given messaging guidance, talking points today; California early quake alert didn't warn all CA residents; USGS: At least 85 aftershocks after 6.4 earthquake

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