In this web exclusive scene, science correspondent Miles O'Brien explains the difference between pipe bombs and pressure cooker bombs, like the ones used at the 2013 Boston Marathon. Pipe bombs are much smaller so the pipe itself is the shrapnel. Less space means more pressure, and their size makes them easier to conceal.
Watch video See the Difference Between Pipe Bombs and Pressure Cooker Bombs online without registration, duration hours minute second in high quality. This video was added by user PBS NewsHour 31 May 2013, don't forget to share it with your friends and acquaintances, it has been viewed on our site 6,077,008 once and liked it 30 thousand people.