 On 28 August 1987, Reform the Armed Forces Movement rebels led by Gregorio Honasan attempted a coup against President Corazon Aquino.They attacked Malacañang Palace, Camp Aguinaldo and Villamor Air Base.Querubin, along with Red Kapunan and Juancho Sabban, attempted to bring Philippine Military Academy cadets from Baguio to Manila to provide support for Honasan.