With no new nationwide event pic on the marquee, Marvel Studios' ensemble superhero pic easily stayed No. 1 in its second weekend. 'Friendship' makes plenty of pals at the specialty box office.

Ryan Coogler's period vampire thriller 'Sinners' also held strong in its fourth week of release, and is soon expected to cross the $300 million threshold.

What kind of staying power will "Thunderbolts" have at the box office? That's the big question after the film's second weekend, where "Thunderbolts" collected $34 million overseas and $67.1 million globally.