The Blessed Sacrament Festival Choir is rehearsing the “Messiah” oratorio which it will perform in its entirety with a professional orchestra at 7:30 p.m., Friday, March 1 at the church, 1427 W. Braddock Road in Alexandria. Soloists are Michelle Kunz and Joshua Hong, Washington National Opera, and Sally Mouzon and Philip Pickens, San Francisco Opera. Free-will offering at the door. Champagne at intermission and reception following the performance. For more information, contact John McCrary, 703-998-6100 ext. 103.