david mercer, al jazeera sto santo domingo, dominican republic. >> some 250,000 people started the process but so far only about 300 have received residency permits. "america tonight" will have more reports from the dominican republic next week, as david mercer speaks to those who have only known that as their home. >>> why a tiny mollusk is a precursor. >>> thursday on "america tonight," lisa fletcher investigates what's behind a citizens campaign that's lit up marijuana activists in ohio. is it really a ground up effort or are business interests pulling the strings? that's thursday on "america tonight." >> when you hear about climate change the images that generally come to mind are polar bears stranded on ice flows or violent storms lark the coast. but there are effects while less seen are just as impressive. lisa fletcher found evidence that the phenomenon is already threatening marine life in the pacific northwest. >> so this is the taylor shellfish farm. >> yes, this is basically the hutcherie where we grow under controlled condition our larvae. >> what may be the most prolific nurse

david mercer, al jazeera, sto santo domingo, dominican republic. >> some 250,000 people started the process but so far only about 300 have received residency permits. "america tonight" will have more reports from the dominican republic next week, as david mercer speaks to those who have only known that as their home. >>> why a tiny mollusk is a precursor. >>> thursday on "america tonight," lisa fletcher investigates what's behind a citizens campaign that's lit up marijuana activists in ohio. is it really a ground up effort or are business interests pulling the strings? that's thursday on "america tonight." >> comedy great, richard lewis >> i really am in love with the craft... >> turning an angst ridden and neurotic outlook... >> i have to un-ravel myself on stage as fearlessly as possible >> into an award winning career... from hell? >> it's thrilling when it's working.... >> every tuesday night. >> i lived that character. >> go one on one with america's movers and shakers. >> we will be able to see change. >> gripping. inspiring. entertaining. talk to al jazeera. only on al jazeera americ