What extincted the dinosaurs?

An asteroid impact in the Caribbean just off the coast near what is now the town of Chicxulub Mexico caused an explosion of 15,000,000 times of the 50 Megaton nuclear bomb or 'Tsar Bomba' which removed the dinosaurs, the few who survived died of lack of oxygen due to the CO2 it released aftermath of the explosion. The tsunami resulting from this impact swept as far inland as the northern part of what is now the state of Texas!