Speaking English is a good language to know especially in America. If you don't know English and you are moving from a foreign country, I recommend you learn English. If you don't know English school and communication would be much harder for you. Its always good to learn the basics of English and then practicing some more. You will still get to speak your language, but when outside or a place where the majority of people speak english you should learn. Different languages and English are important languages to learn, so others can understand you better.
As Carolyn Cole says herself in an article for Nieman Reports to her the only uplifting part of covering Hurricane Katrina was the instant and immediate response from readers.