A 45-year-old Briarcliff Manor man was arraigned Wednesday after thousands of images containing child pornography were found at his home, Westchester County District Attorney Anthony A. Scarpino said. Anupam Biswas of Briarbrook Drive was charged in Briarcliff Village Court on one count of promoting an obscene sexual performance by a child, a Class D felony, and one count of possessing an obscene sexual performance by a child, a Class E felony.