Stephen Mark Berlin, of Potomac, died on June 17 from ALS. He was 73. Berlin had a lifelong career in the Mid-Atlantic real estate industry, and battled ALS for five years. He is survived by wife, Judith Berlin; children, Abbe Gross and Alexis Smith; sister, Donna Perlstein; brother-in-law, Jerry Snelnick; and grandchildren, Aidan, Riley, Zane, Mikah and Dylan. Donations can be made to the ALS Association of DC/MD/VA. Services entrusted to Sagel Bloomfield Danzansky Goldberg Funeral Care.