ISTANBUL Five US senators urged Secretary of State Marco Rubio to use American influence to facilitate massive humanitarian aid deliveries into the Gaza Strip, particularly infant formula for starving babies. Sens. Ruben Gallego, Peter Welch, Tim Kaine, Mark Kelly and Elizabeth Warren wrote with urgency Friday about "the grave crisis that infants in Gaza face as a result of severe restrictions" on humanitarian aid entry and distribution. "Specifically, we write to you today asking that the