MANILA, Philippines — President Ferdinand Marcos Jr. on Wednesday convened the heads of different agencies in Malacañang for a situation briefing on the ongoing unrest of Mayon Volcano.He reiterated his directive for a coordinated response to the impact of ashfall, pyroclastic density currents, and the threat of lahar in some parts of Albay.According to the Presidential Communications Office (PCO), frontline agencies have conducted evacuation, r…