I interviewed with two different firms for internships this upcoming summer. I received an offer from one, and didn't hear back from the other. So I accepted the offer and moved on.
However, the second firm has now called me to make me an offer for this summer. I am extremely interested in working for the second firm (more excited than for the first one), and I would love to accept the offer. I don't want to renege, I know it's bad.
Is it possible to work two internships in one summer, one after another? How would I handle this logistically? My summer break is 15 weeks long.