There was (allegedly) 12 apostles, all cowards, apparently.
Of these 12, 1 did, according to Christian legends, betray Jesus, another one (according to hearsay) survived. So, 12 cowards that became, or so some believe, 10 martyrs [yeah the count is not right, Doc forgot about Judas, he is just such a serious Biblical scholar like that].
Of course, it's only hearsay we got from a biased source and, of course the characterization of the apostles as cowards is a bit sharp.
Sure, Peter, if you believe the myth, did deny knowing Jesus, but in the hours right before that, he physically threatened a whole Roman patrol all by himself and even wound the guy the Roman brought with him. Rash actions, to be sure, but not actually cowardly.
Come to think of it, this is a contradiction in the character of Peter as told by the Gospel story, really, these guys were more severely in need of an editor that Dan Brown himself.