From Harlingen, Texas: A training exercise was held at Hanna Early College High School, involving the Brownsville Independent School District and multiple law enforcement agencies. The event took place on a Tuesday morning and included dozens of officers in full riot gear. The purpose of the exercise was to assess response capabilities in the event of an emergency attack.

Multiple agencies participated in the full-scale active attack training. Further details about the exercise are available from ValleyCentral, including the specifics of what was evaluated during the training.