Why was it necessary for the president to call up the National Guard to maintain the peace and establish a presence outside some schools and universities?

during which incident? There's alot of mass shootings

lost > < > < > < > < > < > < > > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > > < > < > < > < > > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > > > > < > < > < > < > < > < > > < > < > < > < > > < > < > < > < > < > > < > < > < > < > > < > < __a__t__l__a_s_|

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though africans landed with few possessions, they carried their cultures, skills, and spiritual worldviews into the americas. wherever african religions took root in the new world, africans and their descendants changed and adapted their belief systems to local circumstances and influences. individual circumstances created variations in the way people practiced their faiths, what they believed, and what significance it held for their lives.

explanation:

mark brainliest!