The Dallas (Texas) Morning News, on Flight MH370:

One part of the mystery solved, another continues to build.

Malaysia's prime minister ended the rankest speculation with the announcement Monday that Malaysia Airlines Flight MH370 was likely lost in the southern Indian Ocean.

It was, at least, a merciful gesture for loved ones of the 239 passengers and crew members after more than two weeks of agonizing over how and why a Boeing 777 could simply vanish and whether they should hold out hope for a miracle.

A statement the airline sent to relatives said an analysis concluded that "none of those on board survived." The heartbreaking news let the families move on to a new phase of their vigil.

Prime Minister Najib Razak's announcement also should end conjecture over certain implausible scenarios ...

The detective work to piece together why the Beijing-bound plane went drastically off course is no closer to definitive answers, however. Why did the plane's transponder abruptly go quiet as the plane neared Vietnamese airspace? Was there hidden meaning to the first officer's last words: "All right, good night"? Was the crew overcome by a suddenly depressurized cabin? Why didn't passengers make any cellphone calls? Did lithium batteries in the plane's cargo hold ignite?

The answers are significant to both the flying public and an airline industry that desperately wants to address lingering doubts about safety. The Boeing 777 has a remarkable safety record, with only two serious mishaps among hundreds of aircraft over 19 years. If it has an undiscovered vulnerability, analyzing that could save lives in the future ...

Chicago (Ill.) Sun-Times, on the Obama presidential library:

Just say no to splitting up the Obama presidential library.

Say no to an annex in Hawaii.

Say no to a building at the University of Illinois.

Say no to a facility at Chicago State University.

Sometimes the whole really is better than the sum of its parts.

To realize its full potential, the Barack Obama presidential library and museum should be confined to a single site on Chicago's mid-South Side, within striking distance of the University of Chicago ...

The foundation overseeing the library last week laid out in broad terms its vision, making it a critical moment to draw a line in the sand.

The Sun-Times' Lynn Sweet said that document includes a reference to a "multi-unit facility," possibly a signal that the first couple is looking for more than one building and location. That potentially opens the door for a site in Hawaii or local sites beyond the mid-South Side.

The foundation expects to select a site in early 2015. There's only so much money, so many artifacts, so much time. They should all be concentrated on Chicago's mid-South Side, giving each and every library visitor the richest and most rewarding experience possible.