Flyers stating “It’s OK to be white” were found at Montgomery Blair High School in Silver Spring on Wednesday morning.In a letter sent to parents, the school’s Principal Renay Johnson writes that “Montgomery Blair is a very smart, diverse and inclusive community and we will not fall victim to attempts to divide us.”The fliers were found on 10 exterior doors to the building by staff before students arrived, the letter states.“We are taking this seriously and are investigating this incident,” Johnson writes.Security footage released by the school system shows a person in a hooded sweatshirt posting one of the fliers....