Back to Monday. It's a glorious day, if not a bit chilly in New York City. We're expected to be more March-like for the rest of the week.

6:02 p.m. ET: For all your " Mad Men" fanatics, you might be sad to know that " Mad Men" actress Jessica Pare revealed today she lip-synced "Zou Bisou Bisou" to a track she previously recorded for the season five premiere.

Credit: Ron Jaffe/AMC

5:05 p.m. RT: Christiane Amanpour tweets about covering the pope in Cuba:

4:50 p.m. ET: Stars appear as dizzying streaks in this time-lapse photo from the International Space Station by astronaut Don Pettit. The ISS turns to keep one side oriented toward Earth (that big blue thing at the bottom of the photo).

Credit: NASA

4:24 p.m. ET: ABC News' Jon Karl snags an exclusive interview with Dr. Jon Reiner, former Vice President Dick Cheney's cardiologist who accompanied Cheney for the heart surgery, which was performed by Fairfax cardiologists Alan Speir and Anthony Rongione.

3:37 p.m. ET: Pope Benedict XVI has landed in Cuba, 14 years after John Paul II's historical visit.

3:28 p.m. ET Dispatch from Havana:

While Cuba is still a communist country, since Raul Castro took power from his brother Fidel in 2006, there have been economic changes. Some small businesses are now allowed - indeed, there's a list of 189 official trades you can be licensed for, which includes working as a clown. As ridiculous as that may sound, these pockets of private enterprise have improved the lives of people here, supplementing their meager official salaries.

Everywhere you go, you see new little shops and storefronts, and private restaurants wedged between the state-sponsored cafeteria. One of our favorites? This open-air butcher shop, complete with a sign showing an angry pig having its head chopped off.  - Katie Hinman

2:15 p.m. ET: ABC News' Nick Watt sat down with Kate Winslet to talk about the upcoming "Titanic 3-D" film. Winslet told Watt that she said "make it stop" when she watched a clip of the film, because it was like watching a home movie for her.

12:01 p.m. ET: Tim Tebow's press conference starts. All the local affiliates go live with it:

Credit: ABC News

11:20 a.m. ET: ABC News' Matt Gutman, who has been covering the Trayvon Martin case before it garnered national attention tweeted:

 11:09 a.m. ET: "Nightline" producer Kate Hinman, who is traveling with Christiane Amanpour on the pope's tour of Cuba, tweeted:

8:35 a.m. ET: TRAYVON MARTIN CASE: Lead prosecutor and veteran State Attorney Angela Corey tells ABC News that convicting Trayvon Martin's killer won't be easy because of Florida's "stand-your-ground" law.

"The stand-your-ground law is one portion of justifiable use of deadly force," Corey said. "And what that means is that the state must go forward and be able to prove it's case beyond a reasonable doubt… So it makes the case in general more difficult than a normal criminal case."

8:15 a.m. ET: Terry Moran tweets

Read Terry's take HERE

8:02 a.m. ET: "Nightline" anchor Terry Moran is headed to the Supreme Court this morning to cover the ruling on "Obamacare."