Eyewitness Alan Reeves said there "were loud bangs" when the car's tyres exploded.

BBC: North Norfolk Railway signal box catches fire

There were several very loud bangs and fire coming out of the engine.

CNN: Passengers report scare on earlier US Airways Flight 1549

Suddenly, "This girl was shrieking, " followed by loud bangs just seconds later.

WSJ: Cops investigating after NY college student killed

Residents reported hearing "loud bangs".

BBC: Radford fire: Oxygen cylinders cause roof fire

Police used "flash-bangs, " devices meant to stun people with a loud noise, and negotiated with Tsarnaev for about half an hour.

CNN: As Boston reeled, younger bombing suspect partied

Police used "flash-bangs, " devices meant to stun people with a loud noise, and started 20 to 30 minutes of negotiation with Tsarnaev.

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