North Kingstown, Rhode Island (CNN) -- What does Katherine Russell know? We're not the only ones who want answers to that question. According to a number of federal officials, investigators have plenty of questions for the widow of slain Boston Marathon bombing suspect Tamerlan Tsarnaev: What might she have known, if anything, about his activities in the days and months preceding the April 15 bombings? About his travel and associations? And then there's that phone call law enforcement sources say Russell placed to her husband after authorities released pictures identifying him as a suspect in the bombings. What was up with that?
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FBI, and America, have questions for suspected bomber's widow
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Investigators want to know what she knew of her husband's activities
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Her lawyer says she knew nothing of plans to bomb marathon
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She spends her days in her parents' Rhode Island home
After all, lots of people handle pressure cookers every day in kitchens across @placeholder.