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Falcon Heavy booster landing redux: How many boosters will Falcon Heavy Flight 2 land successfully?

According to this tweet from Elon Musk, SpaceX will again attempt to land all three boosters of its Falcon Heavy rocket when the rocket next launches in early April 2019.

We’re going to try. Side boosters come back to Cape, center core lands on droneship. Latter will be coming in v hot & fast, so dicey.

The maiden flight of the Falcon Heavy in February 2018 saw two of three boosters land successfully; both on land. The center core made a hard landing in the Atlantic Ocean near the ASDS Of Course I Still Love You.

As of the time of question writing, the next flight of the Falcon Heavy is scheduled for no earlier than 22:36 UTC on Sunday April 7 2019. This question should close retroactively to the time of liftoff in the unlikely event that the launch is brought forward.

This question asks: How many of the Falcon Heavy's boosters will successfully land after the second flight of the Falcon Heavy?

A 'successful landing' is one in which the booster makes a nominal landing either on SpaceX's landing pads on land or on an Autonomous Spaceport Drone Ship. A landing which destroys or heavily damages the booster is not considered successful for the purposes of this question.

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