（文本为音频大致内容，可能与音频并非完全一致，欢迎大家贡献听写稿^^）
This is AP News Minute.
Federal agents are zeroing in on how the Boston Marathon bombing was carried out, but no word on who did it and why. An intelligence bulletin released late Tuesday includes the picture of a mangled pressure cooker and a torn black bag.
The head of Boston Marathon says the race will go on in 2014, calling the race a deeply held tradition and an integral part of the history of the city.
An envelope addressed to Mississippi Senator Roger Wicker has tested positive for ricin, adding to jitters over terrorism. The letter was discovered Tuesday at a mail processing plant just outside Washington.
Pat Summerall, the NFL player-turned-broadcaster who teamed up with John Madden and called NFL games for more than two decades is dead at the age of 82.
Sandy Kozel, the Associated Press with AP News Minute.
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