Jaish-e-Mohammad chief Masood Azhar, his brother Abdul Rauf Asghar and two others of the Pakistan-based terror group have been formally charged for the deadly attack on the Pathankot air force base in January. The National Investigation Agency (NIA) has named Masood Azhar as the mastermind of the January 2 attack in which heavily armed terrorists hijacked a police car and entered the highly secure air force base in Punjab, killing seven security men before being shot dead in an 80-hour operation.