Tyson Gay, Asafa Powell and Sherone Simpson all embroiled in athletics drug bust.
Even when judged against the inglorious and grubby scandals of the past 25 years this will go down as a dark day for athletics.
Tyson Gay has again thrown down the gauntlet to Usain Bolt before the world championships by reinforcing his status as the current fastest man in the world.
Mo Farah is unequivocal. "It's the big one," says the double Olympic champion of Sunday's 5,000m Diamond League race in Birmingham.
On a night when Usain Bolt returned to somewhere close to his swaggering best by running 19.
Peter Eriksson, the UK Athletics head coach, believes that British athletes can collectively give their season a kickstart by winning the European Team Championship after naming a strong team for next week's competition in Gateshead.
They played the theme to Star Wars at the Stadio Olimpico but there was nothing galactic about Usain Bolt's performance as he was surprisingly defeated by Justin Gatlin in the 100m at Rome's Golden Gala meeting.
Justin Gatlin and Mike Rodgers have warned their Jamaican rivals Usain Bolt and Yohan Blake that they intend to win a sprinting "dogfight" after securing a one-two in the 100m at the Diamond League opener in Doha.
Mo Farah will definitely run in the London marathon on Sunday and has no plans to change his security arrangements or schedule before the race in the wake of the terrible events at the Boston marathon.
The Metropolitan police will urgently review security for this Sunday's London Marathon in the wake of the bombs at the Boston event, it said on Monday night.
Mo Farah has become the first British man to hold the 5,000m and 10,000m Olympic titles after winning gold in the shorter event on Saturday night.
Jessica Ennis won Great Britain's fourth gold medal of the day - and 12th of London Olympics - with a stunning victory in the heptathlon.