Mag world view: Ad Age slims down; Sesame Street back in print; Gun mags boom; Use that tweet!; NYT social media lessons

• Ad Age cuts frequency in half (Folio:)
• Cross-platform magazine advertising up 6 per cent (Folio:)
• Sesame Street Magazine Returns to Print… (Mr. Magazine)
• The Rupert Murdoch era is all but over' (Guardian)
• Gun mags see boosts in circulation, newsstand sales (Ad Age)
• Comics and film magazine Tripwire moves from print to digital with app launch (Press Gazette)
• Marie Claire deputy Charlotte Moore steps up to editor at InStyle (Press Gazette)
• Go ahead, use that tweet: no one can stop you! (paidContent)
• If a tweet worked once, send it again — and other lessons from The New York Times’ social media desk (Nieman Journalism Lab)