Feb. 1 (UPI) -- Sam Raimi 's Rachel McAdams -Dylan O'Brien thriller, Send Help , is the No. 1 movie in North America, earning $20 million in receipts this weekend, BoxOfficeMojo.com announced Sunday. Coming in at No. 2 is Iron Lung with $17.8 million, followed by Melania at No. 3 with $7 million, Zootopia 2 at No. 4 with $5.8 million and Shelter at No. 5 with $5.5 million. Rounding out the top tier are Avatar: Fire and Ash at No. 6 with $5.4 million, Mercy at No. 7 with $4.7 million, The