More than 70 people remain trapped under rubble in Wolong county....
Explosives Used to Access China 'quake-lake'...
The search for the missing continues on the wreck of the Costa Concordia, off the Italian island of Giglio. Rescue workers are using explosives to open passage...
Federal prosecutors say Tamerlan and Dzhokar Tsarnaev used fuses made from Christmas lights and model car parts to make 'sophisticated' bombs....
Robot 'Daksha' used to defused explosives in Pune....
