PHOTOPHOTOGRAPH BY RICK FRIEDMAN FOR SPORTS ILLUSTRATEDFlash Mob The people of Boston made a strong showing—would you expect anything else?—when SI put out a casting call for a photo shoot last Saturday at the Boston Marathon finish line on Boylston Street, steps from where two bombs exploded on Patriots' Day last year. A crowd of 3,000, including runners who were near the blast, first responders and mayor Marty Walsh (center, in blue, to the right of the cherry picker), arrived by 7 a.m. to celebrate the city's—and the race's—resilience in the face of the terror attacks. To see the final shot, check out this week's cover and page 52. PHOTOPHOTOGRAPH BY KOHJIRO KINNO FOR SPORTS ILLUSTRATEDInstant Artification While Augusta National looks much as it did in 1972, much has changed since the year Ben Crenshaw played his first Masters. Back then he was on the cutting edge of golf, and Polaroid snaps were on the cutting edge of photography. Now both are nostalgia plays—which doesn't make taking in either one any less enjoyable. Crenshaw, 62, missed the cut this year, but before he did, photographer Kohjiro Kinno got an instant shot of the two-time champion putting on the 10th green. Such a photo will soon be impossible. Polaroid cameras are increasingly rare, and Crenshaw says next year's Masters will be his last. PHOTOPHOTOGRAPH BY PATRICK MCDERMOTT FOR SPORTS ILLUSTRATEDA More Perfect Union Traditional powerhouses Boston College and Minnesota made up half of this year's Frozen Four in Philadelphia, but when it was time to cut the nets, tiny Union (enrollment: 2,241) wielded the scissors. The Dutchmen took down BC in the semifinals and then blitzed Minnesota 7--4 in the championship game behind a goal and two assists from junior defenseman Shayne Gostisbehere (not pictured). Gostisbehere hopes to have more shining moments on the Wells Fargo Center ice. The only NHL draftee on Union's roster was taken by the Flyers.