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:

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

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.