Through the 2008 Summer Games, the U.S. has never won a medal in handball, table tennis, rhythmic gymnastics, and badminton. According to the olympic website, the US has 3 events it has never won a medal in----I know one of them is Handball, but do not know the other two. Through the 2006 Winter Games, the U.S. has never won a medal in biathlon and nordic combined.
The circle with the arrow means male, and the circle with the plus sign means female. the circle with a plus-sign is used as the zodiacal symbol for the planet Venus. It is the female and male sign. the one in your question with the top pointing up is male, and the one with the cross pointing down, is female.
The circle is considered a symbol of unity, because all the regular polygons are embraced by the circle. It is also the symbol of infinity, without beginning or end, perfect, the ultimate geometric symbol.math.dartmouth.edu/ ~matc/math5.geometry/unit9/unit9.html. The Circle: Paradox and Paradigm. circle is a special ellipse in which the two foci are coincident and the eccentricity is 0. Circles are conic sections attained when a right circular cone is intersected by a plane perpendicular to the axis of the cone. en.wikipedia.org/wiki/Circle.