HOUSTON, June 12 : The Democratic Republic of Congo held an open training session in Houston on Friday in front of an enthusiastic crowd from the local Congolese community as they put behind them concerns over the Ebola virus that hampered their build-up to the World Cup. The Congolese arrived in the United States on Thursday, one of the last teams to travel, and face Portugal in their Group K opener in Houston on Wednesday. Colombia and Uzbekistan are the other two teams in the pool. The