SOURCE - RESTRICTIONS: Pool - AP Clients Only

DATELINE: SAN JOSE, Costa Rica - May 3

SHOTLIST:

1. Med of President Barack Obama and Costa Rica President Laura Chinchilla at presser

2. SOUNDBITE: President Barack Obama, President of the United States of America:

"We have evidence that chemical weapons have been used. We don't know when, where or how they were used. We are initiating on our own to investigate, to get a better handle on the facts inside of Syria."

3. Wide of Obama and Chinchilla

4. SOUNDBITE: President Barack Obama, President of the United States of America:

"If in fact, there is (the) kind of systematic use of chemical weapons inside of Syria, we expect that we're gonna get additional, further evidence. And at that point, absolutely we will present that to the international community because I think this is again not just an American problem. This is a world problem."

5. Wide of Obama and Chinchilla

6. SOUNDBITE: President Barack Obama, President of the United States of America:

"In terms of any additional steps that we take, it's gonna be based on number one, the facts on the ground. Number two, it's gonna be based on what's in the interest of the American people and our national security, and as president of the United States I'm gonna make those decisions based on the best evidence and after careful consultation, because when we rush into things, when we leap before we look, then no only do we pay a price, but often times we see unintended consequences on the ground. So, it's important for us to do it right."

7. Med of Obama and Chinchilla

8. Wide of Obama and Chinchilla

9. Med of Obama and Chincilla leaving the stage

STORYLINE

President Barack Obama says he doesn't foresee sending U.S. ground troops into Syria.

Obama was asked at a news conference in Costa Rica what he might do if more evidence of Syrian use of chemical weapons emerges.

Obama says that as commander in chief he doesn't like to rule things out, but he doesn't foresee a scenario in which American boots on the ground would be good for the U.S. or good for Syria.

He says leaders he's consulted in the region agree.

Obama says the U.S. is putting pressure on the Syrian government in other ways. And he says if systematic use of chemical weapons is confirmed, the United States will present that evidence to the international community.