[00:12.50]has blamed the accident on an employee, who he said had failed to properly set the brakes.

[00:17.83]At least 15 people were killed and 45 others are still missing in the town of Lac-Megantic where the crash sparked a massive blaze.

[00:26.30]From Lac-Megantic, David Willis.

[00:28.82]Ed Burkhardt was heckled by angry residents and faced some pointed questions from local reporters after being whisked into town with a police escort.

[00:39.06]Having initially refuted suggestions that his company should be held to blame for a disaster, which wiped out virtually this entire town,

[00:47.76]he conceded that the train’s engineer had failed to fully secure the brakes.

[00:52.58]Mr Burkhardt said the engineer in question initially insisted he’d applied the hand brakes, but inquiries had revealed that that wasn’t the case.

[01:01.17]He said the man had now been suspended without pay.

[01:05.18]Dzhokhar Tsarnaev, the man accused of carrying out the Boston marathon bombings with his brother, has pleaded not guilty to all charges,

[01:12.96] including using a weapon of mass destruction.

[01:15.46]Mr Tsarnaev spoke in a Boston court in his first public appearance since the attack which killed three people and injured 260 others in April.

[01:25.38]Jonny Dymond reports from Boston.

[01:27.60]Dressed in an orange prison jumpsuit, Dzhokhar Tsarnaev was led into the court, handcuffed and shackled.