90 seconds: 4 stories you can't miss

More than 100 people are dead after a devastating earthquake hit central Mexico. President Trump caused a stir in his first speech to the United Nations. A new effort to repeal and replace the Affordable Care Act is underway. Ref Rodriguez is stepping down as Los Angeles Unified school board president. 

Credits: Brian van der Brug / Getty / KTLA / Francine Orr / Allen J. Schaben / Al Seib

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