Garner's Modern American Usage (2009) notes that phrases like obviate the necessity or obviate the need are sometimes considered redundant, but these phrases are not redundancies, for the true sense of obviate the necessity is 'to prevent the necessity (from arising),' hence to make unnecessary..
At the Redskins game against the New York Giants on November 30, 2008, Clinton Portis ran down the field with a flag in the team's colors with the number 21 on it to honor the anniversary of Sean Taylor's death.
Taylor was born on 21 May 1832 the son of a chemist and Methodist lay preacher James Taylor and his wife, Amelia (Hudson), but as a young man he ran away from the Christian beliefs of his parents. At seventeen, after reading an evangelistic tract pamphlet entitled Poor Richard, he professed faith in Christ, and in December 1849, he committed himself to going to China as a missionary.