A young East Bay man, who federal prosecutors say spoke of unleashing a wave of violent terror attacks across the Bay Area, pleaded guilty on Tuesday to providing material support to a foreign terrorist organization by opening multiple social media accounts for two ISIS sympathizers.

Berkeley High School graduate Amer Sinan Alhaggagi, 23, entered the guilty plea in a federal courtroom packed with family members – almost a year after originally pleading not guilty last August.

Alhaggagi’s attorney, Mary McNamara,