No doubt the friendly, but highly-charged rivalry between Jamaica's two world record holders. [Yohan Blake] and Bolt will be the focus of attention after what has been a highlight year for both. But other Caribbean sprinters such as St. Kitts' [Kim Collins] and Trinidad and Tobago's [Richard Thompson] and fellow Jamaican Powell cannot be ruled out of the medal mix in the 100 and 200 meters. The 22-year-old Blake made a show of his aspirations when he easily won last year's World Championships after Bolt was disqualified: he then made a permanent dent in Bolt's armor of invincibility by clobbering him twice (100m and 200m) at Jamaica's Olympic trials earlier this month. Other Caribbean athletes poised to make their mark in London are Grenada's Rondell Bartolomew, (400m), Ryan Braithwaite à former World Championship gold medalist of Barbados, (110m Hurdles); St. Vincent and the Grenadines' Kineke Alexander (Women's 400m), Antiguan sprinter Daniel Bailey, (100m), and Guyana's Aliann Pompey, a former Commonwealth Games gold medalist (Women's 400m).