By Robert Sanchez Howard University coach Nic Askew isn’t just building a strong program; he’s building something bigger. Inside the Howard University pool, a couple dozen blocks from the U.S. Capitol, bouncy hip-hop blasts across six lanes of open water as hundreds of people begin to filter through the metal doors where they will witness a singular sight in college sports: an entirely Black swim team. It’s an overcast October afternoon in Washington, D.C., and Howard is an hour from facing its cross-district rival, Georgetown, in the Bison home opener. The crowd around the Burr Gymnasium pool…