Those aren’t just lyrics to a song by the harDCore punk band, Minor Threat. A recent study published in Science magazine indicates that the color red “enhances performance on detail oriented tasks” and “these effects occur outside of individuals’ consciousness”.
So, that’s why US Soccer wants everyone to wear red when they watch the USMNT play. Don’t forget to pack plenty of red gear when traveling up Nashville to catch the US take on T&T on April Fools day. It may backfire though, 'cause T&T's primary jersey color is also red.
Read more about it here.