Here are 3 big things you need to know—

One — A group of Democratic governors is criticizing the Trump administration's efforts to deploy National Guard troops in major cities.  In a joint statement Thursday, 19 governors called the efforts an alarming abuse of power.  They claim Trump has cut funding for law enforcement and undermined the authority of governors over their states' National Guards. 

Two ---  Federal Reserve Governor Lisa Cook is filing a lawsuit after President Trump's attempt to fire her.  The suit is the start of a legal battle between the two sides that will likely end up in front of the Supreme Court.  It follows a Justice Department criminal investigation into the board governor after she was accused of making false statements on home mortgage applications. 

Katrina was responsible for nearly 1,400 deaths and caused $125 billion in damage. Two days after landfall, more than 80% of New Orleans was flooded due to levee failures.