Crack

And while Chief Minister Ashok Chavan and his cabinet colleagues visited the precincts of the Hotel Trident-Oberoi at Nariman Point to offer homage to the victims killed there, a group of people gathered outside the Leopold Cafe in Colaba - where the first attack was launched on this day last year.
The Force One - the new crack security force of the State government launched here last two days ago (Tuesday) - made its first public appearance by staging a parade from Nariman Point to Chowpatty this morning.

Please explain to me the meaning of "crack" in this context.

Source : http://in.news.yahoo.com/43/20091126/812/tnl-mumbai-bustles-but-pauses-to-remembe.html