About this week's cover

Terror yet again. Tragedy struck one of the happiest days in Boston, and now one of the nation's most prominent sports towns is reeling from the horror. Recreational runners were flowing in when the explosion went off, and now the hospitals are flooded, the city is distraught, and the nation is looking for answers. In this week's Scorecard essay, S.L. Price discusses what made this act of terror so harrowing.

SI Digital

Tragic Finish: As details continue to emerge on the deadly explosions at Monday's Boston Marathon, SI.com will have on the-scene-coverage from the city and its surrounding areas, including updates and analysis from SI senior writers Tom Verducci, S.L. Price and David Epstein; video footage; and Steve Rushin's essay on experiencing Boston and its beloved marathon in happier times with his eight-year-old daughter.

More Boston Marathon coverage on SI.com

SI Staff: Latest Boston bombing coverage

Ian Thomsen: Bostonians very quick to help in time of need

Peter King: Now is a critical time for sports to help

SI Photos: Newspaper front pages on the Boston Marathon

SI Photos: Tragedy at the 117th Boston Marathon

SI Video: Footage of explosions at Boston Marathon

SI Video: Obama addresses nation after the bombings

The Second Season: As the 2013 NBA playoffs get underway, SI.com will have complete coverage of every series, including expert predictions and matchups that you should not miss. Visit SI.com/nba for all the best content throughout the NBA Playoffs' content.

More NBA coverage on SI.com

Ben Golliver: Damian Lillard should undoubtedly be the Rookie of the Year

Rob Mahoney: LeBron is your MVP and it's not even close

Ian Thomsen: George Karl is the top choice in a loaded Coach of the Year field

Ben Golliver: Counting down the NBA's 20 best game-winners of the past year

The Long Road Back

Marcus Lattimore suffered a gruesome leg injury to end his promising career at South Carolina, but NFL scouts and executives applauded once his Pro Day workout concluded. Watch a video of Lattimore's incredible recovery here.

More NFL coverage on SI.com

Don Banks: NFL Mock Draft 6.0

Don Banks: Is Tyler Bray's head ready to complement his million-dollar arm?

Chris Burke: The Big Board: Top 40 prospects in the 2013 NFL Draft

Chris Pronger Is Hurting

Eighteen months after an eye injury and post-concussion symptoms derailed his Hall of Fame career, the Flyers' legendary defenseman is facing a difficult life away from the game. Watch Brian Cazeneuve's sit-down with Pronger to discuss how much it hurts and how much he misses the ice.

More NHL coverage on SI.com

SI Photos: Careers ended early by concussions

Adrian Dater: Kings rise in Power Rankings

Stu Hackel: So who should be the MVP?

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