Is it a mistake?

[v0031]

Boston residents band together to free city bus trapped in deep snow
A Boston woman captured video of residents banding together to free am MBTA bus that became stuck in the deep snow on their street.
Karen Lyons Clauson posted a video to Facebook showing neighbors working to push the stranded bus through the snow on their East Boston street.

I think it should be an.

[SingingAnalyst]

Boston residents band together to free city bus trapped in deep snow
A Boston woman captured video of residents banding together to free am MBTA bus that became stuck in the deep snow on their street.
Karen Lyons Clauson posted a video to Facebook showing neighbors working to push the stranded bus through the snow on their East Boston street.

I think it should be an.

Of course it should be "an".

Sorry about the cliche, but if I had a dollar for every misspelling I make, due to fast typing, spell check not picking up the error, etc., I'd be rich.

[Anzeigenhauptmeister]

Boston residents band together to free city bus trapped in deep snow
A Boston woman captured video of residents banding together to free am MBTA bus that became stuck in the deep snow on their street.
Karen Lyons Clauson posted a video to Facebook showing neighbors working to push the stranded bus through the snow on their East Boston street.

I think it should be an.

Of course it should be "an".

Sorry about the cliché, but if I had a dollar for every misspelling I make, due to fast typing, spell check not picking up the error, etc., I'd be rich.