updated mobile wallet screenshot

ch01.asciidoc

@@ -186,12 +186,11 @@ Joe then selects +Send+ on his smartphone wallet and is presented with a screen
 
 In the input field for the bitcoin address, there is a small icon that looks like a QR code. This allows Joe to scan the barcode with his smartphone camera so that he doesn't have to type in Alice's bitcoin address, which is quite long and difficult to type. Joe taps the QR code icon and activates the smartphone camera, scanning the QR code displayed on Alice's smartphone.
 
-Joe now has Alice's bitcoin address set as the recipient. Joe enters the amount as $10 US dollars and his wallet converts it by accessing the most recent exchange rate from an online service. The exchange rate at the time is $100 US dollars per bitcoin, so $10 US dollars is worth 0.10 bitcoin (BTC) <<blockchain-mobile-send>>.
+Joe now has Alice's bitcoin address set as the recipient. Joe enters the amount as $10 US dollars and his wallet converts it by accessing the most recent exchange rate from an online service. The exchange rate at the time is $100 US dollars per bitcoin, so $10 US dollars is worth 0.10 bitcoin (BTC), or 100 milli-bitcoins (mBTC) as shown in the screenshot from Joe's wallet (see <<airbitz-mobile-send>>).
 
-[[blockchain-mobile-send]]
-.Blockchain mobile wallet's bitcoin send screen 
-*TODO NEW SCREENSHOT*
-image::images/msbt_0104.png["blockchain mobile send screen"]
+[[airbitz-mobile-send]]
+.Airbitz mobile bitcoin wallet send screen 
+image::images/airbitz-mobile-send-msbt_0102.png["airbitz mobile send screen"]
 
 Joe then carefully checks to make sure he has entered the correct amount, because he is about to transmit money and mistakes are irreversible. After double checking the address and amount, he presses +Send+ to transmit the transaction. Joe's mobile bitcoin wallet constructs a transaction that assigns 0.10 bitcoin to the address provided by Alice, sourcing the funds from Joe's wallet and signing the transaction with Joe's private keys. This tells the bitcoin network that Joe has authorized a transfer of value to Alice's new address. As the transaction is transmitted via the peer-to-peer protocol, it quickly propagates across the bitcoin network. In less than a second, most of the well-connected nodes in the network receive the transaction and see Alice's address for the first time.