MERDIE NZANGA U.S. President Joe Biden needs to do more to secure voting rights for Black Americans, said activists travelling through the South to commemorate the historic 'Freedom Riders'. "I am hoping that we will see the same kind of tenacity, commitment, and passion around protecting the civil rights of Black voters as we've seen with other policies," LaTosha Brown, co-founder of Black Voters Matter, which organized the tour, told Reuters from Atlanta on Monday. Dozens of civil rights activists are traveling on five customized buses from Jackson, Mississippi to Washington D.C. this week, to mark the 60th anniversary of…