An experimental crab robot the size of a car helped rescuers during the tragic disaster.
A vessel carrying 16,000 gallons of oil has hit a reef off the coast of San Cristobal.
And some parents managed a last, traumatic phone call with their children as they tried to escape.
A floating, no-emissions car sounds cool, but how would it actually fare in a large-scale disaster?
In 2011, 759 deaths in the United States were attributed to rail transit, according to the NTSB.