Investigators piecing together evidence from the scene of the Boston marathon bombings believe the twin devices were triggered using electronics from toy cars.<br /><br />The pressure cooker bombs were concealed in bags. <br /><br />The devices used radio controlled car components, including a 2.4 GHz radio receiver, an electronic speed control for the trigger and a sub-C rechargeable battery pack. The bombs were packed with Nitrate and perchlorate oxidisers, allegedly taken from fireworks and ball bearings and carpenter's nails that served as shrapnel. The air-tight pressure cooker allowed the slow-burning explosive to generate lethal force.<br /><br /> A New Hampshire pyrotechnics firm said the elder brother paid cash for $200 worth of 'lock-and-load' fireworks kits. Such kits are not legally available in Massachusetts.<br /><br /><br />FOR MORE NEXT MEDIA ANIMATION, GO TO: http://www.youtube.com/subscription_center?add_user=NMAWorldEdition <br /><br />FOR MORE NEXT MEDIA ANIMATION IN ENGLISH, GO TO: http://www.youtube.com/subscription_center?add_user=NMAtv <br /><br />FOR MORE TOMONEWS US, GO TO:<br />http://www.youtube.com/subscription_center?add_user=TomoNewsUS <br /><br />FOR MORE TOMONEWS JP, GO TO: http://www.youtube.com/subscription_center?add_user=TomoNewsJP <br /><br />FOR MORE APPLE DAILY ENGLISH, GO TO: http://www.youtube.com/subscription_center?add_user=AppleDailyEnglish <br /><br />CHECK OUT THE ODDBODS!<br />http://www.youtube.com/user/nxTomo
