that story's crazy. it's just one example of what some say is a huge waste of money. abc's john karl has more. >> reporter: the zombie apocalypse. this isn't some really bad "b" movie. it's an actual scene from the 2012 counterterrorism summit attended by law enforcement officials around the country. summit tickets, $1,000 a pop. paid for with your tax dollars. the zombies look scary, but organizers say the skit was solely to add levity to an otherwise serious meeting on protecting the homeland. senator tom coburn says it's just another example of more than $7 billion in questionable homeland security spending every year. >> wow. wasted. >> reporter: in a new report, coburn cites example after example, including nearly $30,000 for an underwater robot in columbus, ohio, the $69,000