marched in their 65-year history pointing out typically the scientific community is nonpartisan. they felt the need to come out and hear their voice. this whole day of action start ed on social media. their march for washington. >> rachel crane, thank you. coast to coast. let's go to san francisco. people marching in support of si science and against president trump's environmental policy changes and budget cuts. sarah? >> reporter: huge numbers, thousands of people here. they are here to stand up for science, scientific fact, also to stand up against the trump administration. something about the roll backs and they are reminded that in 1970 that's when this all