Thunderbolts (1997) #26

LOCKDOWN For the good of the team, he gave up his liberty to atone for his sins. Now MACH-1 is back in prison, surrounded by the super-villains who used to be his peers- and who now want him dead! Will a prison break gone awry restore his freedom- or just give the Rhino, Boomerang and Whirlwind the chance to finish him off?