Read the full story as pressure mounts on Boeing and the FAA.
Ethiopian Airlines crash
American Airlines pilots confronted Boeing about concerns regarding the Boeing 737 Max, the model that crashed in Ethiopia on March 10, US media has reported.
A meeting took place in November last year following a crash in Indonesia that killed 189 people.
Pilots said they hadn't been fully informed about the new anti-stall system, which investigators say may have caused the crashes.
Boeing promised to make changes to software but this was still in progress when the Ethiopian Airlines plane crashed and killed all 157 people on board.
The 737 Max is currently grounded worldwide.
The US plane maker Boeing has reported a 20% fall in profits for the first quarter of the year because of lower deliveries of its 737-Max.
It's also withdrawn its profits forecast for 2019, as it scrambles to get the model back in the air following two deadly accidents.
The company said it would be issuing a new forecast when it has more clarity around the issues surrounding the plane involved in crashes in Ethiopia in March and in Indonesia last October.
Some 157 people died last month when the Boeing 737-Max 8 went down six minutes after take off on a flight from Ethiopia's capital, Addis Ababa, to Kenya's capital, Nairobi.
The model has been grounded while Boeing tries to correct the automated flight control system blamed for the crashes.
A family of a Kenyan man who died in last month's Ethiopia Airlines crash said it is taking the plane manufacturer Boeing to court in the US.
In all, 157 people died when the Boeing 737-Max 8 went down six minutes after take off on a flight from Ethiopia's capital, Addis Ababa, to Kenya's capital, Nairobi.
The 29-year-old engineer George Kabau was one of more than 30 Kenyans on board.
At a press conference in Nairobi his siblings said they wanted the company to release emails relating to the plane, which has now been grounded, Reuters news agency reports.
"We cannot replace him, and he cannot and shall not be replaced. But we pray that by what is happening, my parents especially and us as his siblings and all other loved ones, can use his demise to ensure safe travel for all," said Mr Kabau's sister.
Boeing is facing three other law suits relating to the Ethiopia crash, including from members of the family of a Rwandan victim.
The Ethiopian Airlines plane nose dived several times before it hit the ground, a preliminary report released a fortnight ago said.
Pilots "repeatedly" followed procedures recommended by Boeing before the crash, according to the first official report into the disaster.
Boeing's boss has admitted for the first time a failure in the jet's anti-stall system was a factor in the crash.
But the company has not commented on the legal cases.
A quick reminder that the tweet by Donald Trump comes after American Airlines said it was extending the cancellation of its Boeing 737 Max 8 flights from June until mid-August.
The move is to "provide confidence" to customers during the peak summer travel season, the airline said in a letter.
Last month, 737 Max aircraft were grounded worldwide following fatal crashes involving Ethiopian Airlines and Indonesia's Lion Air.
Boeing is developing new software for the jet's anti-stall system, which has come under scrutiny since the crashes.
The full story is here.
BBC Radio 4
American Airlines and Southwest Airlines announced this weekend that they would scrap flights because of the grounding of 737 Max planes.
American Airlines said 115 flights a day would be affected in the coming months by the grounding of the Boeing jets.
Southwest Airlines has cancelled its Max flights to 5 August.
Chris Tarry, aviation expert, told BBC Radio 4's Today programme that it is going to take a considerable period of time for the planes to get back in the air.
They were grounded after the worldwide following fatal crashes involving Ethiopian Airlines and Indonesia's Lion Air.
The story on the American Airlines groundings is here.