Last night Boston law enforcement officials cornered two suspects -- Tamerlan Tsarnaev and Dzhokhar Tsarnaev, believed to be responsible for the Boston Marathon bombing on Monday -- on the MIT campus. Officer Sean Collier and Tamerlan Tsarnaev were killed in the ensuing shootout.

Most of Boston has been under lockdown since this morning, and according to recent reports, Dzhokhar Tsarnaev has abandoned his automobile. Click through our interactive timeline to get the whole picture of what went down and when: