It's only a quick visit and part of the city is in full lockdown.
Residents will have to show proof of ID and also be escorted by the police.
In my 30 years here, I have never seen anything like this, but that is the world that we live in.
President Obama will lay a wreath at the memorial for USS Peary which went down in Darwin Harbour in 1942 during the Japanese bombing here.
He then travels to the RAAF Base (just around the corner from work here) to address the ADF troops and also to announce details of the US Military build up here.
I might be able to see Airforce 1 coming into land but that is about as close as I'll get to the President.
USS Peary Memorial at Bicentennial Park Darwin