Army of the Dead

In the Nevada desert, a military convoy transporting secret cargo met with an accident, and an alpha zombie, who had good physical fitness and instantly turned all the people he came across into the walking dead, broke free. So Las Vegas was overrun with zombies. The epidemic was contained by building a wall of shipping containers around the city. Some time later, having agreed to a tempting offer from the owner of one of the Las Vegas high-rises for a tidy sum, Scott Ward assembles a team of mercenaries to take $200 million out of the building's vault. And most importantly, you need to have time to complete the operation before a nuclear bomb is dropped on the city.