Japanese national record holder Naoki Mizunuma clinched silver in the men's 100-meter butterfly Friday for Japan's first medal in the event at a world aquatics championships.Mizunuma, who shaved 0.05 second off his previous best mark to establish a new Japan record of 50.81 seconds a day earlier in the semis, clocked 50.94 in the final at Budapest's Duna Arena to finish 0.80 behind Hungary's Kristof Milak.Milak, who smashed his own world record to win the 200 butterfly on Wednesday, became only the third male swimmer to achieve the 100-200 butterfly double at a single worlds. Mizunuma also …READ FULL ARTICLE