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.

Thunderbolts” took first place, with $33.1 million from theaters in the U.S. and Canada, according to studio estimates Sunday.

Thunderbolts, aka New Avengers, dominated the box office during the May 9-11 weekend, earning $33.1 million in its second outing. Ticket sales for Disney's Marvel movie dropped just 55 percent from its $74 million opening,