Mark Memmott

The Internal Revenue Service is under fire for improperly singling out some conservative groups for extra scrutiny — putting them through months (or longer) of questions that delayed or derailed the organizations' requests for tax-exempt status.

Well, now the chairman and ranking Republican on the Senate Finance Committee have some questions and requests — actually dozens of them — for the IRS.

ABC News White House correspondent Jonathan Karl now says he regrets that some key parts of a major story he reported on May 10 were wrong.

A challenge to the way a western New York State town board has had prayers read before its public meetings has made its way to the U.S. Supreme Court.

The justices announced Monday morning that they will hear oral arguments in the case of Greece, N.Y. v. Galloway, Susan.

Good morning.

Our early headlines:

-- Pledging Not To 'Screw It Up,' Yahoo Seals Deal For Tumblr.

-- FBI Agents Killed In Training Accident Worked In Elite Unit.

The news that broke Sunday is now official.

Yahoo confirmed early Monday morning that it is buying Tumblr in a deal worth about $1.1 billion. "Per the agreement and our promise not to screw it up, Tumblr will be independently operated as a separate business," Yahoo added.

In its statement announcing the deal, Yahoo says that:

There's no relief today for folks in the nation's midsection.

Take a break from the scandal du jour for something that's just darn nice.

T-shirts will surely be made:

Along with draft rules for how to become a licensed grower or seller of marijuana, the Washington State Liquor Control Board this week released the official "icon logo" that will need to be put on packages of pot and "marijuana-infused products sold at retail."

Dick Trickle, a "short-track hero" in the '70s and '80s who moved to the NASCAR circuit later in his career, died Thursday.

According to The Charlotte Observer, the 71-year-old was killed by "an apparent self-inflicted gunshot wound, Lincoln County [N.C.] deputies said."

Former House Speaker Newt Gingrich, who was front-and-center during the Republican-led impeachment of President Clinton in 1998, is cautioning his GOP colleagues about the risk of appearing to be too eager as they dig into the scandals now dogging the Obama administration.

Friday's major news about the conflict in Syria:

-- "Russia Sends More Advanced Missiles to Aid Assad in Syria."

According to The New York Times, "Russia has sent advanced antiship cruise missiles to Syria, a move that illustrates the depth of its support for the Syrian government led by President Bashar al-Assad, American officials said Thursday."

(Most recent update: 12:50 p.m. ET.)

Saying that "foolish mistakes were made by people trying to be more efficient in their workload selection," the outgoing head of the Internal Revenue Service told Congress on Friday that he and the agency want to apologize for the targeting of some conservative groups during the 2012 campaign cycle.

Update at 5:38 p.m. ET. One More IRS Official To Leave

Another official is out at the embattled agency.

The Associated Press reports that Joseph Grant, commissioner of the IRS' tax exempt and government entities division, will retire June 3. The division scrutinized Tea Party groups when the applied for tax-exempt status.

Update at 4:45 p.m. ET. Obama Names New IRS Acting Chief

Some stories are indeed too good to be true.

This BBC headline had us punching the Two-Way control board to go to light speed in pursuit of appropriate puns:

"Star Wars and Doctor Who fans clash at Norwich convention"

Billionaire investment legend Warren Buffett's Berkshire Hathaway Inc. has had its credit rating lowered from AA+ to AA by Standard & Poor's Ratings Services.

In a statement, S&P says that even though Berkshire Hathaway has an "excellent business profile," the lower credit rating "better reflects our view of BRK's dependence on its core insurance operations for most of its dividend income." (S&P's statement is posted on its website, but you have to register to view it.)

In a message written on a wall of the boat where he was found hiding, Boston bombings suspect Dzhokhar Tsarnaev claimed responsibility for the attack and said it was motivated by anger over the Afghan and Iraq wars, sources familiar with what was found have told CBS News correspondent John Miller.

Thursday morning's economic news:

-- There were 360,000 first-time claims for unemployment insurance last week, up 32,000 from the week before, the Employment and Training Administration says. At 360,000, the pace was the fastest since the last week of March. But it remained well below the 400,000-and-higher rate that lasted from mid-2008 into 2011.

"The head of Saudi Arabia's religious police has warned citizens against using Twitter, which is rising in popularity among Saudis," the BBC reports. "Sheikh Abdul Latif Abdul Aziz al-Sheikh said anyone using social media sites — and especially Twitter — 'has lost this world and his afterlife.' "

International Digital Times notes that:

"CAPTURED!"

That's how the New Orleans Police Department spread the word on Facebook early Thursday that its officers had "arrested 19-year-old Akein Scott in connection with the shooting of 19 people on Mother's Day."

Update at 4:05 p.m. ET. Second Suspect Arrested:

Early casualty reports indicate that a powerful suicide car bombing Thursday in Kabul killed at least seven Afghan civilians, four foreign civilian contractors who were working for international forces and two members of the international military force.

Dozens more people were reportedly injured by the blast in Afghanistan's capital city.

"A massive emergency response" is underway in North Texas, where tornadoes blew through Wednesday night, The Dallas Morning News says. A twister that hit Granbury, about 35 miles southwest of Fort Worth, left at least six people dead, more than 100 injured and even more homeless, The Associated Press adds.

Update at 6:42 p.m. ET: Reaction From Boehner's Office

In a statement, Brendan Buck, a spokesman for House Speaker John Boehner, said the emails "contradict statements made by the White House that it and the State Department only changed one word in the talking points."

Here's the statement in full:

That giant rubber duck floating in Hong Kong's Victoria Harbor, which we posted about on May 6, is down for maintenance.

And when we say down, we mean it. It's been deflated.

But fans shouldn't despair. Ducky's hosts say it just "needs to freshen up" and will return. It's set to be in Hong Kong until sometime next month.

He doesn't want to know who's going to resign, House Speaker John Boehner, R-Ohio, told reporters Wednesday morning.

He wants to know: "Who's going to jail" for what IRS personnel did to some conservative groups?

All branches of the U.S. military have been ordered "to retrain, re-credential and rescreen all sexual assault prevention and response personnel and military recruiters," the Pentagon confirmed Wednesday morning.

Saying that their client is not a "monster," attorneys for Ariel Castro have told Cleveland's WKYC-TV that the man accused of kidnapping three young women, holding them captive and repeatedly raping them over the course of about a decade will plead not guilty to all charges if he is indicted by a grand jury.

The language is not dramatic, but the message is clear: A much-anticipated report from the Treasury Department's inspector general for tax administration is straightforward about how Internal Revenue Service personnel unfairly singled out some conservative groups for unnecessary scrutiny during the 2012 campaign cycle.

As the report's summary says: