You do this to a letter when it is at the beginning of a sentence or if it is the first letter of a pronoun.
This is the annual championship series of Major League Baseball (MLB) in North America, contested since 1903 between the American League (AL) champion team and the National League (NL) champion team.
This continent contains 54 countries. It is bordered by 5 oceans. It contains the worlds longest river. It's main exports are Gold and diamonds, Oil, Cocoa, Timber, and Precious metals. It is also the origin of the world's oldest skeleton, and has been named by scientists as the geographical origin of human life.
This soccer team competes as a member of the Eastern Conference in Major League Soccer, and is local to the Washington D.C. area.