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There have been several attempts to kill or injure leading public figures in the United States by sending bombs in the mail. The intended victims have included former President Obama and Bill and Hilary Clinton. In all cases so far the bombs have been detected and dealt with. Hugh O'Rourke, from security firm MSA Security, says such bombers often act on their own.

Whistleblowers exposing corruption in Kenya might be awarded 10% of money or assets recovered as a result of their evidence, if a new bill there becomes law. Joy Mdivo is a Nairobi-based human rights lawyer, and considers what impact the new law would have on whistleblowing if it gets approved. Online retailing giant Amazon has been working on facial recognition technology which it hopes to sell to the US immigration authorities. Shona Ghosh is senior technology reporter at Business Insider, and brings us the details. Plus we look at the impact sitting at a desk all day can have on an employee's health.

(Picture: A member of the Broward Sheriff's Office bomb squad is seen as he investigates a suspicious package in the building where Rep. Debbie Wasserman Schultz has an office on October 24, 2018 in Sunrise, Florida. The Secret Service said it intercepted an explosive device sent to former President Barack Obama and a similar one that was also sent to former Secretary of State Hillary Clinton and her husband former President Bill Clinton. Another similar explosive device was sent to CNN's offices in New York as well as one sent to billionaire philanthropist George Soros on Monday. Credit: Getty Images.)