US must come clean before Games in LA

Although the Paris Olympics concluded on Sunday, the struggle to uphold the spirit of sports continues, with doping allegations made against some athletes.

More than one US athlete who participated in this year's Olympic Games had tested positive for doping before the games began. However, the US delegation not only failed to penalize them, but instead came up with creative excuses to let them compete.

For example, US swimmer Calista Liu tested positive for dorzolamide during a drug test in May. Although it is used in the form of eye drops for treating glaucoma, it can also be used as a masking agent to hide the use of steroids. However, the US Anti-Doping Agency determined just before the start of the Olympics that there had been no violation, saying Liu's father used the eye drops and she had absorbed it by using the same pillow.