The CNN Daily Mash-up is a roundup of some of the most interesting, surprising, curious, poignant or significant items to appear on CNN.com in the past 24 hours. We'll top it with a collection of the day's most striking photographs.

Lugar lays it on the line

After conceding defeat Tuesday night to tea party favorite Richard Mourdock in Indiana's Republican Senate primary, U.S. Sen. Dick Lugar issued a statement lashing out at Mourdock and his no-compromise philosophy.

He has pledged his support to groups whose prime mission is to cleanse the Republican Party of those who stray from orthodoxy as they see it. This is not conducive to problem-solving and governance. And he will find that unless he modifies his approach, he will achieve little as a legislator. Worse, he will help delay solutions that are totally beyond the capacity of partisan majorities to achieve.

A dunk tank at prom?

Your high school prom is supposed to be a time for making memories. This group of teens got more memories than they bargained for when they posed for a picture on a dock.

Cool images from Hong Kong

CNN iReporter Jerry Gonsalez shot some pretty cool photos of colorful fish during a visit to Hong Kong's Ocean Park. What could be more fun than a bunch of cool-looking fish?

Clothes make the man - or not

Facebook founder Mark Zuckerberg, never one to bow to corporate convention, showed up Monday wearing his trademark hooded sweatshirt for a meeting with potential investors on Wall Street. That caused Michael Pachter, an analyst for Wedbush Securities, to sniff to Bloomberg that Zuckerberg appears too immature to run a huge corporation. CNN.com users jumped all over Pachter. This comment from user silentazure is representative:

This just shows how little Wall Street understands the creative class. Knowledge workers don't care about wearing suits and puffing themselves up. They will crush your prehistoric business from behind a keyboard in their underwear.

You're fired. You're rehired. You're fired.

Try to keep up: A state prison sergeant who was fired after being accused of using excessive force on an inmate and then won his job back was notified within minutes of his return that he will be fired, CNN affiliate KCRA reports. See you in court.

On the horizon: Lighting the Olympic flame

The Olympic flame for this summer's London Games will be ignited in Greece on Thursday and transported aboard a special aircraft to the United Kingdom. A torch relay beginning May 19 will travel 8,000 miles across the UK, carrying it within 10 miles of 95% of the population.