'Nightline' Daily Line, May 18: Facebook Frenzy

8:52 p.m. ET:  JuJu Chang send us a snap from the Asian American Journalists Association Quiz Bowl.

 8:08 p.m. ET: World's scariest place to 'do one's business'

(Rex Features via AP Images)

6:52 p.m. ET: A true sign of the times as one family with five daughters spends a grand total of $1.5 million on college tuition, board, and related expenses.

6:21 p.m. ET: HHS Secretary Kathleen Sebelius barely got out two sentences today before a protester at the Georgetown University Public Policy Commencement sprung to his feet calling her a "murderer," ABC News' Serena Marshall and Molly Hunter reported.

Watch what happened here:

4:24 p.m. ET: When it was all said and done, Facebook's stock price finished were it started:

Credit: Google

2:55 p.m. ET: If you live in the southwestern part of the United States, you are in for a real treat on Sunday.

ABC's Ned Potter reports there will be a rare  annular solar eclipse - a ring of sunlight as the  new moon, passing between Earth and the sun, blocks most, but not all, of the sun's disc - on Sunday afternoon. Tweet us photos @Nightline!

Credit: ChinaFotoPress/Getty Images

12:29 p.m. ET: ABC's Dan Harris tweets:

12:01 p.m. ET: Tech blog Gizmodo reports that Facebook stock is trading at a record-breaking 2.7 million shares a second, but at the same time, they also humbly remind us that Facebook's IPO won't make the average person rich.

10:14 a.m. ET: Everywhere Lady Antebellum goes, "Club La Bellum" goes too (it even has its own Twitter feed). The Grammy award-winning country group showed ABC's Juju Chang how they like to unwind backstage before a concert, with a little ping pong and Kentucky bourbon.

9:30 a.m. ET: Let the trading games begin! Facebook IPO opens on the stock exchange.

Credit: Facebook